Elecs Superbook Answer Key

7/22/2019 Elecs Superbook Answer Key

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Self-Sufficient Guide to ECE by JASON AMPOLOQUIO 6 1

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Past PossibleAnswer Key

Section 0Introduction to Unit Systems

Quiz 11. A. coulomb (C)2. D. volt (V)3. C. maxwell/gilbert4. A. gilbert/maxwell5. A. joule/second6. A. gauss/oersted7. B. ampere (A)8. C. gauss9. B. weber10. B. m-2kg-1s4A211. A. coulomb/Volt

12. D. weber/m2

13. B. volt-second14. D. m2kgs-2A-215. B. henry/meter16. D. weber/ampere-turn17. A. m2kgs-3A-118. D. weber/ampere19. B. weber20. C. m2kgs-321. B. gauss22. D. m-2kg-1s3A223. A. Weber/m224. A. m2kgs-2A-125. A. weber/m226. D. oersted27. B. m2kgs-3A-2

28. C. ampere-turn/m29. D. ampere-turn30. C. joule (J)31. A. kgs-2A-132. A. maxwell

33. A. gilbert34. B. ampere-turn/weber

Section 1Electricity & Magnetism

Quiz 21. B. Amperes Law2. C. Jx =

3. B. remanence4. B. Remanent induction5. C. lodestone6. B. Ampere's law7. C. ferrites8. B. flux9. D. Valence10. B. A force set up when current

flows through a conductor11. B. Gilbert12. B. Curie temperature13. A. 0.0125714. C. 50,000 G15. B. diamagnetic16. B. ampere17. A. small and positive18. B. Like poles repel, unlike poles

attract19. A. soft magnetic materials20. A. The magnetic north pole21. C. ferromagnetism22. B. newton per coulomb23. C. 2,000 G

24. D. nickel, cobalt and steel25. D. Core loss26. B. 6.241018elementary charges27. B. Amperes Law28. B. high permeability but low

coercivity29. A. Copper30. D. soft iron31. C. magnetic field32. D. magnetized33. C. electromagnetic radiation34. B. ideal inductance35. B. Curie temperature36. D. triboelectric effect37. B. magnetic induction38. A. flux density

39. C. (a) Minimum(b) minimum

40. C. North to South41. D. ferrimagnetism42. C. large and positive


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43. B. Lenzs law44. D. Residual45. A. linearity46. C. In inverse proportion to the

square of the distance47. C. 78.5% nickel and 21.5% iron48. D. Bismuth49. C. electric motor50. A. in a direction determined by the

left hand rule51. C. 18052. C. Matter53. B. (a) 90 (b) 27054. C. magnetic flux55. B. Conductance56. A. 10,000 G57. D. The conductivity of a material

for magnetic lines of force58. C. attract each other

59. B. BA

=

60. B. James Clerk Maxwell61. B. Willard Boyle and George Smith62. D. permanent magnets, memory

devices, and magnetic recording63. A. 064. B. Chromium65. B. Copper

66. B.o

B

H

67. C. Keeper68. C. magnetomotive force

69. B. current70. B. weber

71. B.o

K1 +

72. A. Amperes law73. D. Michael Faraday74. A. magnetism75. C. Buck Converter76. C. Coercive force77. C. large and positive78. A. small and positive

79. B. 7 14 x 10 Hm

80. D. antiferromagnetism81. D. A little greater than 182. C. slightly greater than 183. A. Flyback Transformer84. D. Fringing Fields85. B. compound86. D. magnetization87. A. paramagnetic

88. A. 799989. C. 1 C90. D. Lorentz force law91. A. Coercivity92. C. retentivity93. C. Ampere-turns per meter94. D. tiny molecular magnets95. B. Diamagnetic96. A. Nel temperature97. A. Gauss's law98. B. flux99. B. Curie temperature100. A. leakage flux


Quiz 31. D. Coercivity2. C. high remanence and high

coercivity3. B. soft magnetic materials4. D. air cooled5. A. amorphous6. B. Magnetic induction7. D. low permeability

8. D.N

I

9. A. hysteresis10. B. coefficient of coupling for

tightly coupled is zero11. A. magnetic line of force

12. A. Remanence13. C. 8.854 10 -11 F/m14. A. magnetic field intensity15. B. diamagnetism16. B. small and negative17. D. Zero18. B. Coulombs first law19. A. Faradays law20. D. ferromagnetic21. B. current magnetic field and

direction of force on aconductor

22. B. induced23. C. field flux24. B. Motor action25. B. current induced into the

armature26. B. Coulombs second law27. B. It is perpendicular to and equal

along all parts of the conductor28. A. Energy


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Powerful Review Center 1stbatch performance

The Author

Engr. Jason M. AmpoloquioYoungest Professional Electronics Engineer (PECE)President, Powerful Review CenterDesign ConsultantMSECE Major in DSP-De La Salle University (units earned)BSECE-Central Colleges of the Philippines, 2000HR Reyes ScholarCoach, IECEP QuizzersChampion: 1. ECE Quiz Show (1999)

2. 1stBrain Encounter (1998)3. Physics Quiz Show (1996)4. Mathematics Wizard (1996)5. Inter Engineering Quiz Show (1995)

Battle of the Brain School Representative (RPN-9)Quizzer-19thand 20thIECEP Quiz ShowAuthor:

1. Electronics Engineering SUPERBook2. EST SUPERBook

EST Review Director

Resource Speaker, Various Topics in CommunicationsIn-house reviewer, Various Colleges and UniversitiesSought after reviewer in Communications Engineering


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29. D. All of the above30. B. 4.9 N31. A. current flow32. D. Hysteresis loss33. A. copper, manganese and nickel34. A. (a) Concentric circles

(b) Perpendicular35. C. core36. D. Because separate lines of

magnetic force link andcombine their effects

37. B. Magnetic induction38. D. direction of force on conductor39. B. 1,600 At40. B. mutual inductance and self

inductance of the two coils41. D. flux and current flow

42. D. A force set up when currentflow through a conductor43. A. it does not affect the constant

direct current44. C. Travels from north to south

through the surroundingmedium of a bar magnet

45. C. it always opposes the causeproducing it

46. D. all of these47. A. The flux density, which exist in

the iron core when the magneticfield intensity is reduced to zero

48. D. ferromagnetic49. C. core saturation50. B. Weber theory

51. D. demagnetizing metallic part52. B. Lenz's53. D. All of the above54. C. 63% of its final steady state value55. C. Keeper

56. A.d

Ndt

57. B. 4,00058. B. touching each other59. B. residual magnetism60. B. lodestone61. B. reluctance62. D. all of these63. A. (a) 16 (b) 864. A. (a) Magnetic flux, north to south,

(b) Current

65. D. 1

2

L

L

66. C. weber

67. B. hysteresis loss68. A. is one of attraction for the same

direction of current flow69. B. 10 Gb/cm70. B. reluctance71. D. amount of current72. A. paramagnetic materials73. C. 3300 coulombs74. C. Neutron75. B. potential field76. B. Light energy is emitted

77. C. 1 2M L L

78. C. residual magnetism79. C. low permeability80. C. reluctance

81. C.L

R

82. C. 1.6B 83. C. left-hand rule

84. A. 3J /m / s

85. D. 500 G86. C. using grain-oriented silicon

steel87. B. diamagnetic88. C. superconductivity89. D. electron90. A. decrease by a factor of four91. D. Retentivity92. C. Photons93. C. in specific shells or orbits94. D. Eulectic alloy

95. D. Any of the above96. D. centrifugal97. B. carbon98. B. hysteresis99. D. The electron will jump to an

orbit further from the nucleus100. C. Seebeck


Quiz 41. D. electricity2. C. Electromagnetic induction3. D. magnetic susceptibility

4. A. Flux5. D. matter6. B. Curie temperature7. C. Amperes law8. A. magnetic pole


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9. C. Residual induction10. A. 500011. D. diamagnetic12. A. supermalloy13. A. Gaussmeter14. C. magnetism15. B. semi-conductor16. B. Lenzs law17. B. Boost Converter18. D. 2107N/m19. A. oersteds20. D. A and B21. C. The phenomenon where RF

current flows in a thinner layerof the conductor close to thesurface, as frequency increases

22. B. Air gap

23. C. near to one end of a magnet24. B. ferrites25. C. flux density26. C. increasing the resistance of

magnetic medium27. A. Aluminum28. B. Coercivity29. A. paramagnetism30. A. dynamic electricity31. A. 0.5 Gauss32. A. volt ampere33. C. Photons34. D. neutron35. D. photons36. D. Lenz law37. C. At/Wb

38. D. repelled39. D. transformer action40. B. coulombs41. D. hall effect42. A. iron43. D. carbon44. A. flux lines45. C. magnetic flux46. C. reluctance47. D. all of these48. D. element49. D. all of these50. D. tesla51. D. all of these52. C. mixture53. A. diamagnetic54. A. increases55. C. domain56. C. thrust57. B. 200 At58. D. All of the above

59. C. directly proportional60. B. magnetic lines of force61. A. can aid or oppose each other62. D. 166 joules63. D. All of the above64. B. 100 watts65. C. the reciprocal of the resistance66. B. cannot enter67. D. paramagnetic68. D. element69. C. hysteresis70. C. compound71. D. element72. D. degaussing73. B. Electron74. A. atom75. D. Proton

76. C. Hall Effect Transducer77. D. it has an intrinsic coercivity

greater than or equal to about300 oersteds

78. B. Ionized79. D. permeability80. C. The number of free electrons81. D. Intensity of magnetization82. B. Negative83. D. an atom with unbalanced

charges84. C. Friction between two insulators85. C. 2 A86. B. field intensity87. A. Positive

88. A. hydrogen89. A. Unlike charges attract eachother, like charges repel eachother

90. A. one91. D. Each of the above92. D. moving either the magnet or

the coil93. C. electrophoresis94. A. magnetomotive force95. A. Entering negative charge,

leaving positive charge96. B. atoms97. A. High-fidelity speakers98. A. Reluctance99. D. Both A and B above100. C. magnetic field


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Section 2

Resistor & Resistance BasicQuiz 5

1. A. 1.59 x 10-8

2. D.5

R6

3. C. temperature4. D. 3.6 ohms +/-10%

5. A. 1 2 3G G G+ +

6. A. R17. D. conductance8. B. The resistance value changes

with age9. B. is the inverse of the total circuit

conductance

10. C. heating, magnetic, and electricshock11. D. force field12. C. is equally applied to all branch

conductances13. B. The nature of the material of

the conductor only14. D. 4700 ohms + 5%15. B. 2.24 x 10-816. C. Typical power rating of a

carbon-composition resistorranged from 0.125 W to 2 W

17. C. Potentiometer18. A. first digit19. D. its length increases20. D. all of these

21. B. bleeder resistor22. B. 1%23. B. 3.4 ohms +/-2%24. B. (a) Two (b) three25. A. The resistance of the conductor is

the hindrance by which theconductor opposes the flow ofcurrent

26. B. 20%27. B. temperature coefficient28. D. Tolerance29. C. Resistance of a conductor which

has a length of 1 m andcross-section of 1 m2at 25C *

30. A. red, red, red31. D. 0.001 inch32. C. Yellow33. D. The effective resistance is

increased34. C. increases

35. D. The square of current

36. C. A reciprocal relationship37. D. 1.68 x 10-838. D. By the wattage rating39. C. 22,000 ohms + 10%40. C. 3 V41. A. Directly to the conductive paths

of a circuit board42. A. is always constant43. A. 1:444. B. Rheostat45. C. 4.2 Joules per calories46. B. The temperature should remain

constant47. C. positive, negative48. D. Transistors

49. C. 20%50. C. product of their R values

divided by the sum of the tworesistors

51. C. the multipliers52. C. increase in resistance per ohm

per degree centigrade53. D. Surface mount resistors54. D. Rheostat55. B. high in both directions until a

voltage threshold level isreached, then resistance islow in both directions

56. D. R457. C. decreases58. D. Carbon

59. B. Potentiometer60. C. of interatomic collision61. A. linear62. A. Cross-sectional area is

decreased, length is increased63. C. 4 64. D. 19 kohms + 20%65. A. 0.1 W66. D. either A or B67. A. Zero68. A. 25%69. C. 3:170. C. 6 71. A. 372. C. multiturn variable

73. D. Negative74. B. A voltage source and aconductor

75. D. Carbon composition resistor76. A. 2


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77. C. 12 V78. B. 2.65 x 10-879. A. the resistance of the heater coil

is more than that of the supplywires

80. C. Red, black, gold81. D. wire-wound resistors82. C. 88 k83. D. Current increases84. D. Aluminum85. A. Varistor86. A. a column of mercury87. B. thermistor88. A. Copper89. A. 4800 ohms 10%90. C. 10.6 x 10-891. B. the temperature should remain

constant92. D. semiconductor93. C. effect produced94. C. Wirewound resistor95. B. Second digit of the value96. C. voltage97. B. resistances98. C. Voltage dividers99. A. individual, combinations of100. D. Short

Section 3Inductor & Inductance Basic

Quiz 6

1. B. the flow of current2. B. 0.0133 seconds3. C. 63% of its final steady state value4. C. High permeability and low

reluctance5. A. an open circuit6. D. is unchanged at t= 0+7. D. 4.2 H8. B. 12.5 H

9. C.L

R

10. A. Increases inductance11. B. mutual inductance and self

inductance of the two coils12. D. By core type

13. B. current14. A. soft iron15. A. increases inductance16. D. direction of force on conductor17. C. 12 ohms

18. A.d

N

dt

19. C. 0.25 second20. B. touching each other21. D. all of these22. D. all of these23. A. Lenz's law24. D. Changes in current25. C. connected with many individual

current paths26. B. coefficient of coupling for

tightly coupled coil is zero27. C. Magnetic flux28. C. flux linkage29. D. the time constant30. D. all of these31. B. The magnetic flux ratio linking

the coils32. C. using grain-oriented silicon

steel33. B. 0.1 microseconds34. A. Because all inductors have

resistance which dissipatespower

35. D. 13.5%36. D. Resonant frequency37. D. Conductor tensility38. B. 439. A. solenoid40. C. conductivity41. D. 314 ohms42. D. Lenz law43. C. it always opposes the cause

producing it44. A. An ac circuit45. C. 4.48 H46. D. tends to oppose changes in

current47. D. all of these48. A. magnetic flux density49. D. Hysteresis loss50. C. core saturation51. D. Whenever the flux of one

inductor causes an emf to beinduced in another inductor

52. C. exponential law53. B. 1990 kHz, 2010 kHz54. C. Flux linkage

55. D. 63.2%56. A. Faradays law57. B. current, magnetic field and

direction of force on aconductor


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58. B. 559. C. 33.333 mH60. B. 90 degrees61. A. be doubled

62. C. 21

LI2

63. D. All of the above64. B. tends to oppose the decay of

coil current65. A. Counter electromotive force66. D. Zero67. B. 109 ohms68. D. flux and current flow69. C. Increases inductance70. A. it does not affect the constant

direct current71. B. 300 mH

72. D. maximum73. D. Opposes change in current74. D. All of the above75. D. five time constants must have

elapsed76. A. 2.0 henries77. B. Inertia78. D. 94 ohms79. B. Electromotive80. A. zero81. A. 0.0015 sec82. C. It opposes either a rise or a fall

in current83. B. The left-hand rule for

generators84. A. Toroid85. D. conductor86. A. doubles the reactance87. C. The collapsing magnetic field88. B. Leading the current by 90

degrees89. D. Large diameter coils have more

wire and thus more flux90. C. 491. A. (a) Decrease

(b) by 1/2

92. D.N

I

93. D. 1

2

L

L

94. D. 18.1 H95. D. 0.98 H

96. C. inductance characterizes themagnetic properties of a coilwhich are significant for thevalue of self-induce voltagegenerated due to currentchange in the coil

97. A. magnetic field intensity98. A. They are dislodged from orbit99. C. Mutual inductance100. D. To support the windings

Section 4Capacitor & Capacitance Basic

Quiz 71. B. E02. A. 7U0

3. A. 7Q04. A. 7C05. A. 7C06. C. E0/77. C. U0/78. C. V0/79. D. polarity10. A. chip11. D. two plates separated by a

dielectric12. A. RC13. C. when the capacitor is fully

charged14. D. capacitance15. B. polarized16. A. Dielectric hysteresis17. C. electric field around the

capacitor18. C. dry19. C. Elastance20. B. working voltage21. D. metal plates22. C. electrolytic23. D. opposes a change in voltage24. B. coulomb per volt25. C. 33 pF26. C. dielectric27. C. leakage resistance28. A. zero29. C. dc voltage30. B. capacitance is inversely

proportional to the distancebetween the plates31. C. 4372 picofarad32. D. all of these33. D. all of these


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34. A. 0.50 F35. D. Leads the voltage by 90

degrees36. B. to bring positive charge of one

coulomb from infinity to thatpoint

37. C. Dielectric-leakage38. A. 0.2 sec39. C. Newtons law of gravitation40. B. They will distort in the opposite

direction41. B. block dc and pass ac42. D. 10.0 picofarad43. D. Straight lines44. B. conductor45. D. Both A and C46. C. distance between the plates,

dielectric and thickness of theplates47. C. Capacitor48. B. air capacitor49. C. 550 volts50. C. 3 kV51. B. Dielectric-hysteresis52. C. zero53. B. Plates54. A. Reactance55. A. leads the applied voltage by 90

degrees56. D. picofarads57. A. 3 farads58. B. reduces59. C. 8

60. C. positive61. C. cuts the reactance in half62. D. Decreases63. D. A capacitor64. C. Vacuum, air65. A. Dielectric66. B. increasing the area of plates67. B. 2.76 pF68. A. Tank circuit69. A. 34 pF70. D. looks like an open circuit71. C. Block DC and pass AC current72. B. the equation for capacitive

reactance

73. B. 12F

8.854 x 10

m

74. B. Pi-L network75. A. crystal76. A. Both cause the storage of energy77. C. 7.12 MHz

78. D. electrostatic field79. A. Approximately 180. C. Ewald Georg von Kleist81. C. (a) Attracts them to the

positive charges(b) Distorts their orbits

82. B. an insulator between two metalplates in a capacitor

83. B. By their dielectric materials84. A. Oil85. C. working voltage86. D. Thickness of the plates87. C. 10 F88. B. Elastance89. B. The plates are moved closer

together90. A. (a) Glycerine, (b) Pure water

91. D. high capacitance and lowinsulation resistance92. D. Stores electrical energy93. A. 200 volts94. D. Vacuum95. D. 9.55 ohms96. C. 197. B. reduce the working voltage98. C. mica99. D. force100. B. Willard Boyle and George Smith

Section 5Transformer Fundamentals

Quiz 81. A. The transfer of energy from one

circuit to another throughelectromagnetic action

2. D. low iron-loss3. C. Air core transformer4. B. the same5. B. primary winding6. C. 100 watts7. C. turn ratio8. A. variable transformer9. B. One10. D. A magnetic shield11. A. extract moisture of the air12. D. Air, soft iron, and steel13. A. Per unit impedance14. C. hollow-core15. A. Same at all levels16. A. Exciting current17. B. High voltage winding of small

rating transformer


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18. C. the self-induced emf19. A. 12 V20. C. Mutual induction21. A. primary emf22. B. leakage flux23. D. 500 watts24. D. leakage flux25. C. near full load26. A. increase output power27. B. 30028. B. Using magnetic core of low

reactance29. C. The secondary induced emf30. D. red and yellow31. C. The direction of turns of wire on

the primary and secondarywindings

32. B. mutual inductance,self-inductance33. A. the turn ratio is equal to 134. C. The size of the transformer will

reduce35. A. The secondary induced emf36. C. the turn ratio is greater than 137. D. Both A and B38. B. magnetic circuit39. A. As low as possible40. A. volt-amps41. B. the number of secondary turns

divided by the primary turns42. A. a step-down transformer43. D. all of these44. D. 90 to 98%

45. B. 180o out of phase in atransformer

46. D. all of these47. C. opposite to the turns ratio48. A. 60 VAC49. B. Primary current is small50. B. the turn ratio is less than 151. B. 60 volt-amps52. B. increase the output voltage53. D. kVA54. C. insulation and cooling55. D. Air core transformer

56. B. k line voltage ratio=

57. D. step-down type58. C. Is less than the resistance of its

high voltage side59. D. Decreasing the thickness oflaminations

60. D. divided, multiplied, the square ofthe turns ratio

61. C. Decrease the reluctance of themagnetic path

62. A. save power63. A. 40.7 V64. B. 23 V65. C. power, power66. C. Oil-cooling67. C. voltage68. C. P69. A. 1 to 3%70. A. autotransformer71. A. Eddy currents heat up the

metal parts72. D. Isolation transformer73. D. Without changing power,

frequency or shape74. C. The primary is connected to the

source: the secondary isconnected to the load

75. A. It has only one winding76. D. A high-voltage transformer has

more insulation between thelayers of windings than does alow-voltage transformer

77. A. s2

R

k

78. C. continuity79. B. Power transformer80. A. 100 V81. C. Air core82. C. A step-down transformer

83. C. 2

1

V

V

84. C. Secondary winding85. A. autotransformer86. A. Not change87. B. inductor88. B. Decreases the weight per kVA89. C. 999.9 V90. A. about the same91. C. excitation92. C. The flux linkage between the

two windings93. B. low voltage side94. B. Its value cannot be stepped up

or down by transformer95. B. increased inductive reactance96. A. Source current97. C. Lenzs law98. B. Eddy99. A. autotransformer100. D. Low reactance


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Section 6Cells & Batteries

Quiz 91. B. 96, 485 Coulombs/mole2. A. Avogadro's number times the

electron charge3. B. the cell voltage times the

number of moles of electronstransferred times the Faradayconstant

4. C. Faraday constant5. C. anode, cathode, electrolyte6. D. all of these7. A. Zinc container8. D. more stable in their output9. A. applying a reverse voltage10. D. all of these11. C. In a refrigerated space12. C. Both A and B above13. D. all of these14. D. total voltage increases15. A. It has a very stable output

voltage16. D. Connecting the anode and

cathode together without a load17. B. the current increases; the

voltage increases18. B. first in series, then in parallel19. B. 1500 hours

20. A. 821. A. 468 x 1018electrons per second22. D. Two electrodes of the same

metal provide the highestvoltage output

23. A. Laws of electrolysis24. D. All the above25. B. Alkaline cell26. B. Secondary27. C. local action28. C. Discharging the cells29. D. All of the above30. B. Lithium organic31. D. prevents or slows down local

action32. D. All of the above33. C. Emergency equipment batteries34. B. Electrolyte35. B. Specific gravity36. A. Silver-cadmium

37. A. 1

38. C. I, II, and III39. B. types of plates and electrolyte40. D. The secondary cell can be

recharged by passing currentthrough it in the properdirection

41. B. amalgamating the electrodewith mercury

42. B. Check the technical manual forinformation on the specifictype of battery

43. C. Silver-zinc cell44. C. Enough so the float will rise

without entering the suctionbulb

45. D. increase in current capacity

46. D. chemical action to electricalenergy

47. B. 8.4 V48. B. chemical means49. B. 650. B. local action and polarization51. B. 127052. C. Fresh water53. C. 1.5 V54. B. Primary55. B. Magnesium cell56. A. Distilled water57. B. Silver-zinc

58. D.nE

iR nr

=+

59. C. Buckling60. D. increase the current capacity61. D. Terminals should be electrically

connected together beforetransporting a battery

62. C. Flush with fresh water63. B. A carbon zinc cell has unlimited

shelf life64. C. increase voltage output65. B. Cell66. D. It converts the produced

hydrogen into water67. D. Current increases68. B. Manganese dioxide69. A. 6.85 hours70. D. can be recharged

71. B. 200 hr

72. A.rn

E

R+

73. D. Primary cell


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74. B. lead, lead peroxide and dilutesulphuric acid

75. C. The NiCd cell is primary type76. A. it is rechargeable77. D. Battery charge78. D. short time and can be

recharged79. C. Dry cell80. A. 15 amperes81. C. charging an accumulator82. C. Increases voltage supply83. C. the terminal voltage and

strength of the electrolyte84. C. Selenium cells85. A. 1.1586. C. Self discharge87. C. Normal

88. D. nickel cadmium batteries89. D. Type D90. A. Decrease the charging rate91. C. sulphuric acid to water92. B. Primary cells93. B. Steady gassing94. B. 186695. D. the area of the plates96. A. 897. C. 6 amperes for 10 hours98. B. Negative and positive ions99. A. keep the electrolyte level low100. D. 4.2 V

Section 7DC Electrical Concepts

Quiz 101. B. attraction, negative2. D. Mechanical3. D. larger than the largest resistor

current4. B. it is not possible to disconnect

the power5. A. Shorted fuse6. D. Zero current through it7. D. Five8. C. a person to seize the line and

not be able to let go9. D. (a) Decreases

(b) increases10. A. the heart to go into fibrillation11. C. Trip free

12. D. Armature

13. B. plastic14. C. The armature resistance15. B. aluminum16. B. A burnishing tool17. B. A small internal resistance18. C. ET= ER1= ER2... = ERn.19. D. energized20. D. (a) Decreases

(b) increases21. B. silicon22. C. PT23. C. Place your finger on the cover

and feel the relay contactmovement

24. C. greater than the largestresistor

25. D. zero temperature coefficient26. B. Locked-out27. D. An amount determined by the

combined resistance of theremaining branches

28. D. voltage, resistance and current29. B. Is constant30. B. The current of the source31. C. inductor32. D. capacitor33. B. fuse34. B. Rheostat35. D. (a) Increase

(b) decrease36. C. voltage divider

37. C. Microswitch38. C. stability39. B. Zero voltage across it40. C. A light switch41. B. a short circuit42. D. Toggle43. B. from, into44. B. Is constant45. D. Maximum46. B. An ignition switch on a motor

vehicle47. B. The current will drop to 10% of

its original value48. A. A multicontact switch49. D. unaffected

50. D. Less than 10 ohm51. C. add52. D. ground between two of the

dividing resistors53. C. troubleshooting


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54. A. less than55. C. grounded56. D. divide watts by 74657. C. Yellow58. B. 359. B. Second approximation60. D. Locked-in61. B. Coulomb's62. B. voltage63. D. Maximum64. D. The electron theory65. C. (a) Decrease

(b) increase66. A. logical, systematic67. B. Infinite internal resistance68. D. resistive69. C. signal tracing

70. C. A coil attracts a soft iron corewhen current flows in the coil

71. C. desoldering72. D. Two73. D. A starter for a motor vehicle74. B. R2has opened75. B. Power76. D. R2has shorted77. D. current78. A. Three79. B. current probe80. A. Momentary81. D. R3has opened82. A. It is leaving a junction83. A. Ideal approximation

84. A. BTU85. A. as few86. D. everywhere the same87. A. addition88. B. Voltage drop89. C. 50%90. A. amperage91. B. Equivalent resistor92. C. times93. C. older94. A. Equal95. D. A and C96. C. To isolate a faulty circuit

without affecting other circuits97. C. Be sure to "tag out" the

fuseholder when you removethe fuse98. D. A large internal resistance99. D. Nontrip free100. C. A point bender

Section 7

DC Electrical ConceptsQuiz 11

1. C. The equivalent resistance issmaller than 4 k

2. C. A reciprocal relationship3. C. less than the smallest

resistance4. B. The resistance value changes

with age5. C. equal to the sum of the

individual resistances6. C. decrease, increase7. C. Wirewound resistor8. D. 7.07 V9. D. The power level is quadrupled

10. A. All of the points on a voltagenode are at the same potential

11. B. 412. A. 58.1 Vp13. B. Size14. B. at the source with total current15. C. The maximum current that will

flow through a fuse withoutopening the fuse

16. B. The current doubles17. B. uses current flowing through its

coil to actuate electric contacts18. D. adding19. B. Secure the circuit immediately

by removing power at the

nearest switch20. C. resistive21. D. branch22. C. ohm23. C. To adjust the power level of a

device24. C. is the same for every resistor in

the circuit, regardless of theselection of resistor values

25. C. Direct short26. D. The maximum voltage across a

fuse that will not jump theopen fuse

27. B. transmissive and reflective28. C. +15 V, -9 V29. B. A voltage source

30. D. parallel block31. D. Aluminum32. B. the rate energy is used over

time33. D. 41 Vp


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34. B. conductors

35. A. Copper36. D. undergoes an electrical change inresponse to a physical change

37. D. rotary38. A. Cross-sectional area is

decreased, length is increased39. C. smaller than the smallest

resistor40. A. parallel with each other41. A. Zero42. B. P1820.543. A. 3 V44. B. (a) Two (b) three45. D. the largest resistor46. B. (a) Increases

(b) decreases

47. A. heat48. D. no branches exist49. B. RT50. B. 7.46 kWh51. D. Electric charge52. D. A voltmeter check of the fuse53. B. 0 V54. D. all of the above55. A. Electric potential56. D. High resistance57. B. low-voltage direct current58. B. Use an ohmmeter and place a

resistor in series with the fuse59. A. increase, increase60. D. 5.7 , 27.7 W

61. D. Electric current62. C. A fusepuller63. C. electric charge64. B. Put the fuse back in the circuit65. B. coulomb66. A. William Gilbert67. D. tingling sensation68. C. 15 V69. D. Negative70. A. Can't let go71. A. Negative72. C. defibrillation73. C. summed together to find ET74. C. divide the total of R1times R2

by the total of R1plus R275. B. IV, II, III, I76. A. can be different for each

resistor77. A. (a) Equals

(b) divides

78. C. is the same for every resistor inthe circuit, regardless of theselection of resistor values

79. D. Input power voltage80. B. the largest amount of current81. B. Open82. B. 1286 mW83. C. 831 mW84. D. (a) Becomes infinite

(b) Decreases to zero85. B. Ventricular fibrillation86. B. Excessive current87. B. 2400 mW88. A. Fuses and circuit breakers89. C. Stephen Gray90. D. mascular inhibition91. A. Abnormal heating

92. C. it is the sum of the branchcurrent

93. D. In series94. B. 1/RT= 1/R1+ 1/R2 ... + 1/Rn95. C. Zero internal resistance96. D. Electrons moving from

negative to positive97. A. less than any resistor98. C. The current is cut in half99. C. There is an error and you

should recheck yourmeasurements

100. D. Current increases

Section 8Electrical Laws & Theorems

Quiz 121. A. around any closed path equals

zero2. D. entering and leaving any point

equals zero3. D. Peltier effect4. A. node5. B. Davisson-Germer experiment6. D. Faraday's law7. B. Thevenizing the circuit8. C. Nortons9. B. Thvenins10. A. Stefan-Boltzmann law11. A. the superposition12. C. Millmans theorem13. A. Faraday's law14. C. AC as well as DC circuits15. B. Their internal impedance


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16. D. All of the above17. C. a 1.33-mA source and a 3-k

resistance in parallel18. A. Stokes' law19. B. Fermat's principle20. C. AC as well as DC circuits21. A. short RL, determine IL, make

IL= IN22. B. Internal conductance23. C. changes by the reciprocal ratio24. B. a 15.3-V source in series with a

5.1-kresistance25. B. changes by the same ratio26. C. Loop27. C. multiple current and/or voltage

sources28. D. current source and a shunt

resistor29. B. Has zero internal resistance30. D. A and C are correct31. A. Ideal current source32. B. Bilateral network33. C. Current source is a passive

element34. C. Nortonizing the circuit35. D. All of the above36. B. Joule's law37. D. Both A and B38. B. Laplace39. D. an open circuit40. D. Ideal voltage source is one

whose internal conductance iszero

41. C. Neumans law42. D. Norton's theorem43. D. Law of electrostatic attraction44. C. Ampere's law45. C. BCS (Bardeen, Cooper,

Schrieffer) theory46. D. Biot-Savart law47. B. Millmans theorem48. D. Child's law49. C. Heater coil50. B. emf E1and internal impedance

Z151. C. a short circuit52. B. All independent voltage

sources are short circuited andall independent current sourcesare open circuited

53. A. Faraday's first law ofelectromagnetic induction

54. B. Thevenin equivalent resistanceis calculated when all voltagesources are open circuited

55. D. sum of the total currentsflowing out of a junction equalsthe sum of the total currentsflowing into that junction

56. D. current57. C. efficiency is 100%58. A. Nortons equivalent is the

voltage equivalent of thenetwork

59. A. efficiency is greater than 50%60. C. To find dc level in a network

that has both sources61. D. Infinity62. B. Faraday's second law of

electromagnetic induction63. B. A constant current source and

impedance in parallel64. A. 10 sec, 0.985 V65. A. Eth

= InZth = InZn66. C. 69.3 ms67. C. short all voltage and current

source68. C. Both A and B69. C. open RL, determine VL, make

VL= VTH70. A. Nortons theorem71. A. voltage source and a series

resistor72. C. Sources73. C. Faraday's third law of

electromagnetic induction74. D. Must be equal to load

impedance75. B. Reduced by 1/3

76. B.4R

2V

77. A. Linear responses only78. D. Ohms law79. D. Jacob's law80. C. Ampere's law81. B. -9 V82. C. Kirchhoff's current law83. A. Gausss law84. A. Generators are not present85. D. Amperes law

86. B. Brewster's law87. C. Coulomb's first law88. B. Faradays law89. C. Coulomb's second law90. C. Michael Faraday


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91. B. Thevenin's theorem92. B. Grosh's law93. A. Passive network only94. A. Kirchhoff's voltage law95. A. individual, combinations of96. B. Rayleigh's law97. D. A or B98. A. Its zero internal impedance99. A. Faraday's first law of electrolysis100. B. Faraday's second law of

electrolysis

Section 10

AC Electrical ConceptsQuiz 13

1. D. e2lags e1by 2. A. The voltage or current

associated with the resistivecomponent

3. D. instantaneous value4. B. 1500 VAR5. B. The voltage or current

associated with the reactivecomponent

6. D. 17. C. kVAR8. D. It is equivalent to a pure

resistance

9. D. 110. A. 74.317.77 11. B. AC is reversing direction12. A. period13. D. 1400 times14. B. frequency15. D. 12 V16. A. Reduction in power losses17. A. frequency18. C. 400 watts19. B. high power factor20. C. one half the resistance of one

wire21. A. Effective value22. B. resistance23. B. preventing short circuit

between two conducting wires24. C. 0.625. D. be decreased26. B. rectangular form27. D. Volt-coulomb

28. B. polarity, direction29. D. pulsating direct current30. C. speed, direction31. B. cosine32. B. 1.41433. A. 90 degrees out of34. D. period35. B. rms value/average value36. B. infinity37. A. Series38. D. equal impedance39. B. Square wave40. D. equal to generators internal

resistance41. B. Zero42. B. j243. C. never

44. C. Zero45. B. 2.5 ohms46. D. Resistance to impedance47. D. 2.5 ohms48. A. rms49. B. Circuit-control devices50. B. Sine51. B. 19.98 V52. A. -153. C. bias54. B. Unity55. C. along the surface56. D. 90sin((t-71.5)57. D. Resonant58. B. purely resistive59. C. current varies directly as the

voltage and inversely as theresistance

60. C. Draw more current61. C. 34.98 V62. D. Wavelength63. B. current lags voltage64. D. coupling65. B. difference between the two

reactances66. A. frequency67. A. Open circuit68. B. Active current to line current69. C. 66.6 ohms70. D. Watts to volt ampere71. C. 200 V72. D. Increase two-fold73. C. 100 V, 100 Hz74. D. 550 ohms75. C. Always leading76. B. resistance77. C. Breakdown voltage


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78. B. increases, decreases79. B. real power80. B. is the square root of a negative

number81. D. 5.455 A82. D. complex number83. A. Fuse84. B. counterclockwise 9085. A. 3.50 hp86. B. Impedance to resistance87. A. 360 degrees88. B. positive temperature coefficient89. A. Effective value90. B. piezoelectric, piezoelectric91. C. in92. A. The switch contacts return to

their normal rest position

93. D. reactive94. C. true95. D. 1.25 watts96. C. Voltage divider97. D. 42.4sin(50t)98. D. 2238 watts99. D. infinite100. B. A connection point between

two or more conductors

Section 10AC Electrical Concepts

Quiz 141. C. 180

2. B. 2.51 ms3. B. Resistance4. D. the voltage is the same in value

and phase throughout thecircuit

5. C. One circular mil6. D. 2 watts7. A. y = bx8. A. zero9. B. One wire is at ground voltage;

the voltage on the other wiregoes alternately positive andnegative (compared to ground)

10. D. y = b-x11. D. Reactive power12. A. There are three AC voltages,

phased 120 degrees apart onthree or four wires

13. A. It would double14. A. Vdc= 5.3 V, Vrms= 8.39 V15. B. 14.5 mA

16. B. To decrease the reactive power17. A. 39067 ohms18. B. 25,300 ohms19. D. 8,301 ohms20. B. f = np21. B. 72.0 volts22. C. Load23. D. is in phase with24. B. AC can be readily stepped up or

down25. C. larger than R26. D. V27. C. 0 V28. A. the voltage leads the current by

90 degrees29. B. Application to AC circuit having

its impedance used in place of

resistance30. C. Touching a high voltage with

one hand, and "ground" withthe other

31. A. dc to ac32. C. turn on and off 120 times per

second33. D. 0.25 ohms34. A. peak value35. D. spectrum analyzer36. D. All nodes in the circuit37. D. A or B38. A. 0 volts39. A. ripple40. A. average41. B. Effective current

42. A. Joule43. D. A resistor placed in series withthe load44. C. 240 cycles45. C. amplitude and direction46. D. Potential energy47. D. current flow48. A. reactive power49. B. 1.92 50. A. Never mix values51. C. ratio52. C. Toggle switch53. C. R, XL54. A. Two55. C. is in phase with56. A. A voltage that opposes the

applied EMF57. D. A magnetic field58. B. 40 ohms59. D. is in phase with60. C. Amplitude versus time


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61. D. The rms voltage is always greaterthan the average voltage

62. C. leads63. B. Two64. D. is in phase with65. D. Peak value66. A. smaller67. A. Excessive heat condition68. D. increases, decreases69. C. Instantaneous value70. C. switch71. A. the resistor is open or the

capacitor is shorted72. D. Sine waves in phase73. C. purely resistive74. D. the magnetic field, the coil, the

slip rings

75. A. the effective value76. C. triangular waves use

out-of-phase harmonics77. D. Volt ampere78. A. multiples of the fundamental

frequency79. B. effective value80. D. 1.1181. D. the resistance value82. D. all of these83. A. Decreased84. B. the impedance is more

inductive85. A. 1.274 A86. A. effective value87. C. 54.9 ohms

88. C. 660 watts89. B. linear90. C. 6.95 A91. B. Linear circuit92. C. 141.4 ohms93. C. current flow94. A. peak to peak value95. C. 0out of phase96. A. 6.5 A97. D. lags voltage by 9098. B. Effective voltage99. C. Resistors dissipate energy as

heat, capacitors store energy inan electric field, and inductorsstore energy in a magnetic field

100. D. 187 ohms

Section 11

RLC Circuits & ResonanceQuiz 15

1. A. 0.1362. D. all of these3. B. equal4. A. Current high, impedance low5. C. inductor, resistor6. B. the voltage lags the current by

90 degrees7. C. When the inductive and

capacitive reactances are equal8. A. 478 kHz9. C. XCvaries inversely with

frequency10. C. at the resonant frequency

11. B.

2

2

11 R

2LC 2L

12. B. 63%13. C. 100 -37V14. D. 47.3 kHz15. C. wide bandwidth16. B. resistance, impedance17. B. resonance18. B. 119. D. 10.1 MHz20. A. 200 V21. A. halved22. C. the voltage across L and

C >applied voltage

23. D. 0.027 F24. B. maximum, minimum25. B. 50 kHz26. B. The matching network can

cancel the reactive part of animpedance and change thevalue of the resistive part of animpedance

27. C. total circuit voltage28. C. current, total voltage29. D. 1868 ohms30. C. 0, 131. B. 10.3 MHz

32. B.

( )

2

1

RC

2 LC 2

33. B. apparent34. B. seconds35. A. 14.5 MHz


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36. D. inductive37. D. All of the above38. C. Wattles, non-productive power

39. C.

2 1

1 0

f f

f f

40. D. maximum41. A. minimum42. C. resistive43. D. decrease in bandwidth in series

circuit and decrease in parallelcircuit

44. C. 3.56 MHz45. D. series circuit is capacitive and

parallel circuit is inductive46. B. decreases47. B. VR, VL48. B. Determined solely by the dc

resistance49. C. maximum in series circuit and

minimum in parallel circuit50. D. The current circulating in the

parallel elements is at a minimum51. A. minimum52. B. arctan XL/R53. D. changes in stored energy in

inductance and capacitance54. D. Resonance55. C. maximum56. C. negative, positive57. D. high resonant frequency58. B. The frequency at which

capacitive reactance equals

inductive reactances59. B. leads , between 0and 9060. C. 1536 ohms61. D. inductive62. A. lags63. C. Tank circuit64. D. maximum, unity

65. D. ( )+ 22

L CR X X

66. C. capacitive67. C. Higher68. A. voltage, resistor voltage69. B. 18.9 kHz70. D. resistance, impedance71. B. 57,019 ohms72. B. inductive voltage, total voltage

73. C. 23.7 MHz

74. C.

2

2

1 1 R

2 LC L

75. C. 16.5 kHz

76. B. Decreased capacitance77. C. impedance, resistance78. C. 14.5 MHz79. C. XL-XC80. D. The resonant frequency cannot

be easily changed81. B. leads , between 0and 9082. C. greater accuracy and stability83. A. down, impedance84. A. 144 seconds

85. D. 1R

cosZ

or 1 LX

sinZ

or

1 LXtanR

86. C. capacitive87. B. 18.4 MHz88. A. 29.1 MHz89. D. all of these90. B. decreases91. A. lags, 9092. A. inductor voltage leads current93. B. lags94. C. it is at a maximum95. C. 5 V96. A. always, resonant, XL=XC97. D. power factor98. B. 90 degrees out of

99. A.

1

2 LC

100. C. leads voltage by 90

Section 12AC & DC Generators

Quiz 161. C. Flux and speed2. B. pulsating dc3. C. Prime mover4. D. Both A and B5. C. Interpoles and compensating

windings6. C. design of the armature winding7. B. Laminating the iron in the core

8. B. speedcR

9. B. Dynamotor

10. B. a aE=V+I R

11. B. interpoles


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12. D. I, II, and III13. D. 0.10014. C. it reverses the direction of current

flow15. D. By varying the voltage applied to

the electromagnetic field coils16. D. Both A and B17. C. dynamo18. D. Hippolyte Pixii19. B. Separately excited generator20. A. relative motion between the field

and the armature coils21. C. When there is improper

commutation22. C. series, series23. C. the direction of the end

connection

24. B. the rated-load voltage is greaterthan the no-load voltage25. A. resultant pitch26. B. The commutator27. A. to increase the speed of rotation28. A. 1% regulation29. B. electric charge30. C. Hysteresis loss31. A. voltage over a narrow load range32. D. Serve as power amplifier33. C. self excited34. C. the rated-load voltage is less than

the no-load voltage35. D. A or C36. A. Armature reaction

37. C.

2 x #

#

of conductors

N= of poles

38. D. Multiple coil armature39. B. long shunt40. B. Compound-wound41. D. copper loss42. D. Elementary generator43. B. 100%

44. B.Z P

A

NE=

60

45. D. Flux lines are not being cut46. C. rate of change of flux is

maximum47. D. Series-wound48. B. winding pitch49. B. Multi pole generator50. C. self excited generator51. D. High-current52. B. parallel with the field53. B. Field excitation54. C. low voltage, high current

55. C. Alternating current56. D. remains the same57. A. The output voltage varies as

the load current varies58. B. commutator59. D. Rotating field and rotating

armature60. A. Self excited generator61. D. 85-95%62. D. Direction of current flow63. B. demagnetizing effect of

armature reaction64. C. Lap-wound65. B. shunt generator66. A. Shunt-wound67. B. shunt generator68. D. Armature reaction

69. D. Both B and C70. C. The armature71. D. Alternator72. A. Voltage regulation73. B. 0%74. B. using commutator with large

number of segments75. B. Flux and speed76. B. magnetic neutral axis (MNA)77. B. Parallel78. C. saturation of iron79. B. heat-treated silicon steel

laminations80. C. compound generators81. A. Lap-wound and Wave- wound82. C. alternator

83. A. the rated load voltage is thesame as the no-load voltage

84. C. neutralize cross-field ofarmature reaction and obtainideal commutation

85. C. provide dc field excitation86. D. Left-hand rule87. C. 9088. D. Amplidyne89. A. reduce eddy current loss90. D. Slip rings91. A. crowded, weaken92. B. Motor reaction93. C. shunt generator94. C. Parallel operation95. C. Magnetic induction

96. B. moAT =ZIx 2

97. C. Slip rings


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98. B. current which is getting reversed99. B. Prime mover100. C. brush loss

Section 13AC & DC Motors

Quiz 171. B. A wire with a current exerts a

force when in the presence of amagnetic field

2. A. Constant speed3. D. Armature reaction4. C. Direction of flux north to south5. B. 66. C. 90o7. A. Drum wound armature

8. D. An internal self-generatedvoltage, proportional to speed,that subtracts from the appliedvoltage

9. C. Universal10. A. Voltage regulation11. C. High no-load speed, high stall

torque12. A. To limit armature current13. A. Motor14. C. series motor15. C. 600 rpm16. D. Can use slip rings in place of

brushes17. C. 218. A. The polarity of armature current

and direction of magnetic flux19. B. f ' Sf = 20. A. Motor is driven with voltage dc

voltage. As the voltage isincreased, the torque increases

21. B. 2T V

22. A. The armature and the field23. C. Increased field voltage24. B. Single-phase induction25. B. Increases the torque and

decreases the current due toincrease impedance

26. B. The motor is driven withrepetitive pulses. As the pulsewidth increases, the torque

increases (the frequency staysthe same)

27. D. Synchronous

28. B. s120f '

N N

P

=

29. A. the angle between the rotatingstator flux and rotor poles

30. B. Generator action31. A. Reverse the polarity of the

motor wires32. A. the force required to accelerate

the rotor to the synchronousspeed in an instant is absent

33. A. Motor set34. B. The mechanical device the

motor moves35. C. It allows a dc motor to be

powered by an ac power source36. B. A shunt motor maintains a

more constant speed under

varying load conditions than aseries motor

37. C. Rotor runs at a speed which isalways lesser than the speed ofthe stator field

38. A. remove the stator winding andturn it around

39. C. 75

40. A. s

s

N N%slip x 100%

N

=

41. A. Temporarily connecting themotor wires to a resistor forbraking

42. B. increases to 2x the originalvalue

43. B. Induction motor44. B. Nikola Tesla45. B. both supply voltage and

frequency simultaneously46. A. Decreases with increase in load47. B. Has no brushes; power is

electronically switched to thefield coils

48. A. The "normal" force pressing thematerials together

49. C. The synchronous speed50. C. The number of poles and the

speed of rotation51. B. 552. A. The armature speeds out of

control53. B. two54. C. 180055. D. hot-wire relay56. B. The object will accelerate at a

constant rate


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57. B. s120f

N

P

=

58. C. How much "twisting force" isbeing applied

59. C. The total amount of energyremains the same

60. A. Steady load, high torque61. B. Rotating magnetic field62. D. The system is underdamped63. D. All of the above64. A. It is vibrated at a frequency at its

resonate frequency65. C. The rotor by shifting its phase

backward causes motor to takemore current

66. B. Shaft67. A. It causes the speed to decrease

68. B. Very small starting torque69. A. 300 rpm70. B. Slower than the synchronous

speed71. D. To disconnect the power coming

from one rotating shaft to anothershaft

72. A. In the direction of rotation73. C. The AC goes to the rotor and sets

up a "rotating field". The statorgets power for its magnetic fieldthrough induction

74. B. Slip rings75. C. armature current76. A. To provide some phase shift for

the start winding, so the motorcan start

77. D. 8 poles78. C. It decreases79. C. It is self-starting80. A. Slip ring81. B. By reversing either the

armature connections or thefield connections

82. B. Runs without any "slip"83. C. It can run on AC or DC84. B. Synchronous motor85. D. The START button seals on a

relay that closes the motorcontacts, the STOPbutton breaks the seal and

de-activates the relay86. A. Universal motors87. B. To vary the frequency and

voltage in a coordinatedmanner

88. A. The motor stops89. B. An actuator that creates a force

by the principle of advancing a"nut" on a rotating threadedshaft

90. D. Rotor speed is either less ormore than synchronous speed

91. A. 59.5%92. A. The electric is slower and

weaker than the hydraulicactuator

93. B. An electro-magnetic poweredshort-stroke linear actuator

94. A. Series motor95. D. applied voltage96. D. Sequentially energized

electro-magnets

97. A. the motor will stop98. D. Prime mover99. D. Rotating-field100. D. Zero

Section 1Semiconductor Physics

Quiz 181. D. Gallium2. D. Zero3. C. The characteristic curve graph

of the diode4. D. An insulator5. D. negative to positive6. D. Increasing battery voltage7. D. Electron8. A. the doping level9. B. Electrons

10. B. 1N56311. C. Thermal energy


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12. B. The diffusion of electrons andholes moving across the junctioninto the two materials

13. D. Silicon and germanium14. B. +115. A. depletion region16. C. unipolar17. A. Troubleshooting18. D. reverse junction breakdown19. A. linearly20. A. Forward21. A. negative ion22. B. conduction electrons23. D. Majority24. C. Extrinsic25. A. minority carriers that are

thermally produced

26. D. answer A, B and C27. D. The electrons will tend to move

towards the positive terminal andthe holes towards the negativeterminal

28. C. Atoms29. B. the boundary of a p-type and an

n-type material30. D. Crystal31. A. thermal runaway32. B. Crystal33. C. Insulator34. C. an electron falls into a hole35. A. When reverse bias exceeds the

limiting value36. D. answer A, B and C

37. A. It is shorted38. D. 50 V39. B. Forbidden band40. D. answer B or C41. D. Electrons42. A. Covalent bond43. A. The separation between the

conduction and valence bands44. B. Pentavalent45. A. majority carriers46. C. (a) Semiconductor

(b) Valence band47. C. reverse-biased, breakdown

voltage48. D. answers A, B and C49. A. protons and electrons50. A. A few free electrons and holes51. D. Electron52. B. Increases53. C. free electron current and hole

current

54. B. Right55. B. valence electrons, hole, hole56. A. 157. A. majority, p-type, holes58. A. biasing59. C. 860. A. Neutral61. C. in the most distant orbit from

the nucleus62. A. atoms, symmetrical pattern,

crystal63. B. Recombination64. C. a valence electron breaks away

from the atom65. B. 0.7 V66. A. acceptor atoms67. D. All of the above

68. B. valence band, atom69. B. 0.82 eV70. B. increase in level71. D. 0.265 eV72. A. band gap73. B. Barrier potential74. D. holes75. A. Alloy Junction76. B. eight valence electrons

because all are with otheratoms

77. B. Peak forward current78. C. It is the point at which

rectification takes place79. A. 080. B. increase

81. C. N-type only82. D. answer B and C83. A. 084. A. a dc voltage is applied to

control the operation of adevice

85. B. 0.23 ohm86. C. Opto electronics87. A. Load resistance is low88. B. a unique type of atom89. C. minority90. A. Hole91. D. answer A and C92. D. minority93. A. avalanche94. D. Electrons are drawn to the grid

and do not reach the plate95. D. must be greater than 0.7 V96. B. neutral97. D. none of these98. D. 0.265 eV


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99. D. P type100. D. A dynamic electrical check with a

diode test set

Section 1Semiconductor Physics

Quiz 191. B. doping2. D. No holes or free electrons3. C. shells, electrons4. D. a p-type semiconductor5. A. Positive ions6. C. Collision7. C. 38. A. silicon9. D. p-type, 310. C. Reverse current11. C. conducts current12. C. Ionization13. D. extrinsic14. A. the diode barrier potential15. B. majority16. D. Breakdown voltage17. B. donor atoms18. C. Surface-leakage current19. A. increase the number of free

electrons20. C. 0.7 V21. C. covalent bond22. B. electron and proton23. C. may not be equal to the number

of protons24. D. Zero25. B. electron-hole pair26. D. all of these27. B. 0.82 eV28. A. positive, negatively, uncharged29. D. Positive charges30. C. valence band, valence electrons31. D. P-type material32. A. I and IV only33. C. donor atoms34. D. 4.3 V35. A. conduction36. B. intrinsic37. A. 0.555 eV38. C. 0.7 V39. B. Depletion region40. A. Very small41. B. an equal number of mobile and

ionic charges

42. B. Becomes larger

43. B. Ionization44. D. the depletion region45. C. 0.335 eV46. C. Semiconductor47. D. The depletion layer48. A. barrier potential49. B. electrons, nucleus50. C. a negative voltage source

connected to N-material51. C. protons and neutrons52. A. 1,800 times53. C. pentavalent materials54. D. 555. B. Because they pass AC and

block DC56. A. Electron

57. D. protons, atomic number58. C. Reverse current59. B. The breaking of covalent bonds60. D. answer B and C61. A. doping62. C. changing AC to DC63. B. minority, n-type, holes64. C. Intrinsic65. C. energy66. A. V-I characteristic curve67. C. Recombination68. A. proton and neutrons69. A. 1 watt of less70. A. 3271. B. n-type, 572. C. ionization73. A. Acceptor atoms74. B. holes75. B. Electron76. D. neutrons, electrons, and

protons77. D. proton78. D. free79. B. conduction band80. C. n-type81. C. Light emitting diode82. B. thermal energy83. D. all of these84. A. Solid state device85. C. More than 1 billion86. D. (a) 300:1 (b) 10:1

87. C. the current is produced by bothholes and electrons88. D. majority, n-type, free electrons89. B. Right90. C. Valence band


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91. D. gold92. B. there is very small current due

to minority carriers93. A. Equals the number of holes94. B. Photoconduction95. C. both electrons and holes96. C. Only those produced by thermal

energy97. C. minority, p-type, free electrons98. C. Rectifier99. D. Trivalent100. A. 2.63 W

Section 2Diode Circuits Applications

Quiz 201. D. is intended to operate in reverse

bias2. A. Decrease3. B. Within 1%4. D. Answer A and B5. C. there is an open diode6. C. The rectifier will conduct during

both halves of the input cycle7. D. It is approximately constant8. D. All of the above9. B. more positive than the anode10. A. Half wave rectified signal11. B. It is a constant-voltage device12. A. Towards the cathode13. B. I, III and V

14. B. The junction temperature15. B. Schottky diode16. C. 18017. B. One18. B. zener breakdown19. B. IR LED20. B. Has a constant voltage in the

breakdown region21. B. Rectification22. B. 3 V23. B. Percent of regulation24. B. That the diodes will conduct

during both halves of the inputcycle

25. C. 10 26. A. 60 cps27. A. I, II and III28. A. 0.09429. D. variable capacitor30. A. Small

31. D. Voltage regulator32. B. It will increase33. A. 20 34. A. 420 35. B. 0%36. C. Increases37. D. the outermost shell38. D. 0%39. C. Zener resistance40. B. a variable capacitance that

depends on reverse voltage41. D. FWR42. C. Avalanche breakdown43. D. 100 V44. B. when the P material is

connected to the positive sideof the power supply and the N

material is connected to thenegative side of the powersupply

45. C. Voltage regulator46. D. All of the above47. A. 2.4 volts to 200 volts48. D. Bridge and Center-tapped49. C. Diode characteristic50. B. Optocoupler51. D. Tunnel diode52. B. , one53. A. emits light when

forward-biased54. C. Operating in the breakdown

region55. C. Current regulation56. A. Series current57. D. Forward bias58. A. produces light with longer

wavelength59. D. a shorted diode60. A. Junction and point contact61. D. Breakdown voltage62. D. 91%63. C. To protect the relay from high

voltage transients whenmagnetic field collapses

64. C. An action where the minoritycarriers tunnel across the

junction to form the currentthat occurs at breakdown

65. A. Decreases66. B. A shunt regulator67. A. , peak output voltage68. D. Forward bias


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69. C. using a center-tappedtransformer, a full-wave bridgerectifier, and a center tappedload resistor

70. C. clamper71. A. Zener acts like a short circuit72. B. The voltage across the diode

remains almost constant afterbreakdown

73. B. decrease with light intensity whenforward-biased

74. B. Stays the same75. B. 0.82 %76. A. tunnel diode77. B. The energy difference across the

forbidden gap78. A. (a) Narrow (b) wide

79. C. Load current80. C. the axial lead81. D. decrease82. A. 0.7 V83. B. 1,000:10,000,00084. D. reverse bias breakdown mode85. C. I, III, IV, and V86. C. It decreases87. D. Charge storage88. D. in series with both the input and

the load89. A. Decreases90. A. almost maximum value91. C. Maximum zener current rating92. B. I, II and IV93. B. maximum power dissipation94. D. As a tuning device95. D. All segments must be on96. C. it provides a high degree of

electrical isolation97. D. all of these98. A. line regulation99. B. PIV100. B. load regulation

Section 2Diode Circuits Applications

Quiz 211. C. 180 degrees2. D. 63.7 V3. C. 1804. A. A zener diode5. A. connecting an opposite

temperature coefficient diode inseries with forward biasing

6. A. 60 Hz7. D. tunnel diode8. C. twice the peak output voltage9. B. PIN diode10. D. 35.4 V11. D. all of these12. C. as an RF detector13. B. Full-wave signal14. A. when it is forward biased15. B. a series resistor16. C. 14.1 V17. C. Its internal capacitance varies

with the applied voltage18. B. 9.3 V19. C. Maximum and minimum input

voltage, minimum outputcurrent and maximum output

voltage20. D. all of these21. D. 1.7 volts and 20 mA22. A. capacitor, reverse biased,

variable resistor, forwardbiased

23. B. Collision24. D. 47.8 V25. C. A constant voltage under

conditions of varying current26. D. all of these27. A. Maximum reverse current and

PIV28. C. 28.3 V29. B. Ideal30. D. all of these31. C. 1.5 V32. D. all of these33. A. 33%34. C. line or input and load regulation35. B. twice36. C. Rectification37. C. photovoltaic38. C. II, III, and IV39. B. 120 H40. A. photoconductive41. D. 360 degrees42. C. 62.5 V43. A. p-type, intrinsic, n-type44. C. 19.8 V45. C. 200 V

46. C. negative47. C. is simple and inexpensive tobuild


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48. A. Diode resistance is either verylow or very high on eitherdirection

49. D. all of these50. D. Forward bias51. B. 60 Hz52. D. Point contact53. A. Decreases54. A. 28.3 V55. D. bleeder56. B. Reverse-biased57. B. hot-carrier diodes58. D. Ripple factor59. C. 120 Hz60. C. the peak value of the rectified

voltage61. A. Low power consumption and long

life62. C. reverse-breakdown voltage63. A. 0.00564. B. Rectifier65. D. A or C66. A. Half-wave rectifier67. D. diode68. B. Increases69. A. One70. D. all of these71. C. Varactor diode72. D. I, III, and IV73. B. 5.0 V74. A. Decreases75. A. Most positive

76. C. Bridge rectifier77. B. increases78. D. As a VHF and UHF mixers and

detectors79. A. Half-wave rectifier80. A. Voltage regulator81. D. changes in output voltage and

input voltage82. B. Light waves83. D. 41.7 mV84. A. a small value series resistor85. B. changes in load current and

output voltage86. C. thermistor87. C. 4 A88. B. 2

89. A. 0.7 V90. C. Bridge rectifier91. C. 28.3 V92. C. Voltage controlled capacitor93. C. 32.4 V

94. C. Peak inverse voltage95. C. shorted96. A. Circuit will stop rectifying97. C. Increase98. C. Controls gain99. D. a half-wave rectified voltage100. B. An ohmmeter test across a

diode shows low resistance inone polarity and highresistance in the oppositepolarity

Section 3Transistor Circuits Fundamentals

Quiz 221. C. 2.1 mV/C2. B. I, III, and IV3. C. 34. D. the coupling capacitors5. B. Beta6. D. amplifier applications7. C. Frequency multipliers8. A. Class A amplifiers9. A. Q-point on a transistor collector

curves10. A. Input voltage11. C. RF voltage amplifier12. A. Beta increases13. C. Below saturation and above

cutoff14. C. An rf voltage amplifier15. A. unity-gain frequency16. A. The amount of time (in relation

to the input signal) that currentflows in the output circuit

17. C. To establish a proper stable dcoperating point

18. C. No current flows from emitterto collector

19. B. 0.4 A20. D. It decreases21. A. very low22. B. Common collector23. B. the transistor may be driven

into saturation

24. B. Smaller than the output current25. A. 0.9626. D. thin, lightly doped27. B. To transfer energy from one

stage to another


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28. D. All of the above29. B. RC30. D. 8.75 M31. B. An area of low charge density

around the P-n junction32. D. Match the compensating diodes33. C. very low34. D. Resistor35. B. Class B36. C. Class A37. B. It increases38. B. Different from the dc load line39. C. Base current bias or fixed bias40. D. 5 V41. B. To provide maximum

impedance at a givenfrequency

42. A. 1043. C. The output impedance of circuit

number one should be equal tothe input impedance of circuitnumber two

44. B. Emitter to collector45. A. Lower than46. D. PNP transistor47. D. Push-pull48. A. 2N49. A. 5 mV50. D. slightly less than a class B51. D. Polarity of source voltage52. A. C53. A. common-emitter54. B. Class B

55. C. Function and frequency response56. C. C57. B. Voltage divider bias58. A. digital switching applications59. C. An overcoupled transformer60. A. acting like a forward biased diode61. C. The ratio of output quantity to

input quantity of an amplifier62. C. The difference between the

highest and lowest frequencyshown on a frequency-responsecurve

63. A. alpha64. D. 8.33 65. B. Increase66. D. Hole current in the emitter67. A. Narrowband68. B. collector69. D. the signal has a 180 phase shift

from input to output

70. C. That frequency at which thegrounded emitter current gainhas decreased to 0.7 of thatobtainable at 1 kHz in atransistor

71. C. cut-off72. C. Small signal73. A. Class A74. D. method of coupling75. D. At the center of the ac load line76. A. Optimum77. D. All of the above78. C. Class AB79. D. Common base80. B. 0 Hz81. B. looking them up in a transistor

parts manual

82. B. Gain83. B. tuned amplifiers to produce a

sinusoidal output84. A. 5085. A. I, III and IV86. A. Charge storage87. A. Decrease88. A. the voltage gain will decrease89. C. Tuned RF amplifiers90. D. Hum in the circuit91. C. the internal transistor

capacitances92. A. gain93. A. Output is represent for less

than 180 degrees of the inputsignal cycle

94. A. acting like a forward biaseddiode

95. A. The collector current at itsmaximum value

96. C. Bipolar97. A. a switch98. A. Amplify weak signals99. C. coupling capacitor100. C. decreases


Quiz 231. C. I, II, and V

2. C. 0.7 V3. A. the midrange gain4. A. 30 mA5. B. 125 C6. B. series peaking design


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7. D. 100 kHz to 30,000 MHz8. A.

dcR

E

9. A. Base bias10. B. Reverse bias11. C. 6800 Hz12. D. High when clipping occurs13. C. When the base is set to about

0.7 V, causing the base currentto start flowing

14. C. PNP transistor15. A. 016. D. Collector feedback bias17. C. remains constant with

frequency18. B. h parameters19. C. voltage divider20. B. - 6 dB/decade

21. A. A loosely coupled transformer22. B. loadline23. A. 48.2 dB24. C. current25. A. 16.5 k26. D. Input impedance of second stage27. B. Transistor28. B. I, II, and III29. B. 20 Hz to 20 kHz30. B. saturates on negative half-cycle31. B. plastic material32. B. I, II, and III33. A. The coupling and bypass

capacitors34. A. Class C35. A. a narrower bandwidth

36. D. Gate37. B. 22038. A. The coupling and bypass

capacitors39. B. current flow40. B. Very low resistance41. A. RIN(base)> 10 R242. B. Cut-off43. B. 7.544. C. < +/- 0.1 V throughout the active

range of the transistor which maychange base current by a factor of10 or more

45. C. common-collector46. A. An audio power amplifier47. C. complementary symmetry

transistors48. C. Large49. D. Emitter50. C. Larger

51. A. equal to the current in the biasresistors and diodes

52. D. an area of low charge densityaround p-n junction

53. C. C54. D. all of these55. A. collector-base, reverse bias56. C. A parallel LC network57. A. The change of the collector

current with respect to basecurrent

58. B. Vary the capacitance59. A. Decrease60. D. Class D61. B. Using rf transformers62. B. Low63. A. digital switching applications

64. B. no current flows from emitter tocollector65. D. The coupling of a portion of the

output signal to the input ofthe circuit

66. C. Common base67. C. Transformer68. B. quiescent current69. C. Crossover distortion70. A. (a) Low (b) high71. A. one-half the peak load current72. C. 4 A73. C. 800 kohm74. B. Common collector75. B. Is usually small enough to

ignore

76. B. 12 W77. C. base78. A. To provide signals of usable

amplitude79. C. Crossover distortion80. D. Linear region81. B. 2.25 V82. A. can be essentially independent

of DC83. B. AC coupling84. B. 2VCEQ85. D. 5086. B. 0.7 V87. B. forward-reverse88. B. Class B89. B. Bypass capacitor90. B. A swamping resistor in parallel

with the tuned circuit


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91. A. Output is present more than180 degrees but less than 360degrees of the signal input cycles

92. D. minimum93. B. acting like a reverse biased

diode

94. B.C

25I

95. A. IB> IC(sat)/DC96. A. Class A97. A. not affected the collector

current98. A. Forward-biased99. D. all of these100. D. Both A and B


Quiz 241. A. Amplification2. B. Class B3. B. I, II, and III4. B. RC5. D. right at cutoff6. C. Has an AC voltage7. C. Common collector8. D. Equal zero9. C. class B amplifiers10. B. 98%11. C. Transformer12. A. full 360 of the input cycle13. C. In order to produce an output that

is a replica of the input14. C. 14.14 V15. A. negative on emitter, positive on

base, positive on collector16. B. The input signal remains

unchanged and the output signalis controlled by the input signal

17. D. Shockley18. D. answer B and C19. B. impedance matching20. C. 60 V21. C. II, III, and IV22. D. ICand VCE23. C. Emitter bias24. C. heat sinks25. C. Negative feedback26. D. two stages of CC27. B. VGS28. B. PNP transistor29. A. Stabilizes voltage gain

30. B. zero31. A. Emitter-follower32. B. Base, collector and emitter33. D. greater than classes A, B, or AB34. A. Cutoff35. C. Has lower input resistance36. A. Flow into the collector37. A. to maintain a constant voltage

across the emitter resistor38. D. answer A and B39. B. current, voltage40. A. The base current is effectively

amplified to become thecollector current

41. D. Usually destructive42. C. a very small percentage of the

input cycle

43. D. Cut-off44. A. Class A45. D. 30 V46. C. Negative47. B. acting like a reverse biased

diode48. C. Class A amplifier49. C. totem-pole50. C. uses only a small portion of its

load line51. D. Unimportant52. A. Excessive power53. C. enhancing the probability that

electrons will be swept across itinto the collector

54. B. acting like a reverse biased

diode55. B. Neutralization56. A. common-emitter57. D. Increases the overall gain58. A. 500 mW59. D. The final stage in an audio

amplifier60. B. Reduces distortion61. A. AC62. A. Class A63. A. Transformer coupling64. A. Higher gain65. B. No current flow from emitter to

collector66. D. acting like a forward biased

diode67. D. Transformer68. B. Linear and Cutoff region69. C. it produces high leakage

current


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70. B. The presence of capacitanceboth external and internal

71. A. A72. D. positive with respect to the

emitter73. B. RC74. D. current gain75. C. 78.5 percent76. A. Impedance77. D. answer A and C78. A. Very low79. D. answer A and C80. C. Collector current plus base

current81. B. The relationship of the

component to the output signalpath

82. D. megger83. D. Is usually less than the load

resistance84. A. Capacitance85. C. is 5.3 mA86. B. Emitter feedback resistance87. D. A step-down transformer88. B. IC(sat)89. A. Inductors90. A. based on the principle of negative

feedback91. A. Transformer coupling92. B. At the center of the loadline and

cutoff respectively93. A. Fewer parts are used94. B. the voltage gain

95. B. Dependent on re'96. C. P-type collector, N-type base,

P-type emitter97. D. AC collector resistance98. B. VCE(cut off)and IC(sat)99. B. Holes100. B. Collector current to base current

Section 4Field Effect Transistors (FET)

Quiz 251. C. positive VGS(th), negative VGS(th)2. B. Dual gate MOSFET3. A. The gate voltage controls the

drain current4. B. The transistor itself may dissipateup to 100 W of energy (but thisnumber may have to be de-rated)

5. A. pinch-off and breakdown

6. D. Gate-source cutoff voltage7. A. Just below the saturation point8. C. An unbypassed resistance

between source and ground(RS)

9. A. 2.34 V10. B. BJT emitter follower and

MOSFET source follower11. D. all of these12. C. Resistor13. D. common-drain amplifier14. A. Gate material15. A. 1.89 V16. D. Drain current for zero gate

voltage17. A. The gate of MOSFET is

insulated from the channel by

an SiO2layer, whereas the gateand channel in a JFET isseparated by a pn junction

18. D. Zener19. A. Field effect transistor20. C. current and power gain21. A. 3522. A. high input impedance23. C. N-channel FET24. C. Nonlinear25. A. E-MOSFET26. C. MESFET27. C. - VGS(off)


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48. C. using a transistor tester thatworks in an operating circuit

49. C. the enhancement mode50. A. 200 ohm51. B. Transconductance (gm) and the

drain resistance (Rd)52. D. is + 4 V53. D. Output current54. B. 0.8655. D. P-channel FET56. A. IDto the square of a term

containing VGS57. C. the gate-to-source bias voltage

decreases58. C. E-MOSFET59. B. gate is a bar not an arrow60. D. I, II and III

61. B. always slightly less than 162. C. the voltage gain will decreases63. C. measuring infinite resistance in

both directions64. D. depletion65. C. Threshold voltage66. D. the input resistance is the

reciprocal of gm67. A. CS amplifier68. D. Greater than VGS(th)69. A. I, II and IV70. B. drain, gate, source71. C. square-law device72. B. the JFET has a pn junction73. C. A passive load74. D. positive VGS, negative VGS

75. B. positive on the gate with respectto the source

76. C. gate77. C. 4.578. B. An active load79. D. VGS=080. D. much lower input resistance81. B. the maximum possible drain

current82. D. all of these83. C. the source and the substrate84. C. A passive load85. C. One charge carrier device86. B. 1000 M87. D. Complementary MOS88. D. Due to reverse-biased

gate-to-source junction89. D. ID(on)90. C. Greater than VGS(th)91. D. The transconductance (gm)92. B. VDD

93. A. Two-terminal device94. A. drain and source95. B. Gate-to-source96. A. completely closed by the

depletion region97. B. E-MOSFET98. C. the gate-to-source pn junction

reverse-biased99. C. 180100. B. Vp

Section 5Feedback Networks & Oscillators

Quiz 261. B. Opposes the input signal2. A. The resistance of the coil and

inductor3. C. a phase shift around the

feedback loop of 04. D. Colpitts oscillator5. C. oscillator6. A. Zero7. C. greater than 18. D. Negative9. D. Crystal oscillator10. C. types of LC oscillators11. A. Almost equal12. A. Pulsed oscillator13. B. Neutralization14. C. May equal to 115. D. Phase-locked-loop16. A. positive feedback17. C. Capacitor18. B. Shorted feedback resistor19. A. Fewer parts are used20. C. Filter circuit21. B. Differential voltage gain of

the op amp22. B. a VCO23. D. Astable24. C. An overcoupled transformer25. C. Audio oscillators26. D. Ideally zero27. B. a gain of 1 around the feedback

loop28. B. The size and thickness of the

crystal material

29. B. A swamping resistor in parallelwith the tuned circuit

30. B. Sinusoidal oscillator31. C. stability32. B. Current-to-voltage converter


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33. C. increases34. C. In biasing circuits DC negative

feedback is provided whileamplifiers employ AC negativefeedback

35. D. It must have a positivefeedback sufficient toovercome losses

36. A. the charging and discharging ofa capacitor

37. A. LC, RC or crystal38. D. An electrical voltage will appear

across the X axis39. D. A step-down transformer40. B. Distortion41. A. three RC circuits42. D. all of these

43. D. Due to series resonance44. B. 145. D. A resistor IC combination46. B. Three lead or lag circuits47. B. To provide maximum

impedance at a givenfrequency

48. B. RC time constant49. B. A network consisting of one

inductor and two capacitors ortwo inductances and onecapacitor

50. A. Notch filter51. A. no stable states52. B. Very small53. B. multiplication54. C. The piezoelectric effect55. B. Causes saturation and cut-off56. C. Damping57. A. Decreases58. D. all of these59. A. A loosely coupled transformer60. B. Transformer coupling61. D. High power rating62. D. a lead-lag circuit63. C. relaxation oscillators64. D. Output voltage to input current65. B. Frequency cut-off66. B. Two resistors67. B. Using rf transformers68. D. 0.02

69. C. timing circuits70. A. Coupling71. C. A virtual ground72. D. Transformer73. C. Hartley

74. C. 141,000 Hz

75. B. Through the feedbackresistor76. A. sine waves77. D. 360 degrees78. C. Colpitts79. B. period80. C. Ideally zero81. B. it requires no input signal82. D. 55583. C. The difference between the

highest and lowest frequencyshown on afrequency-response curve

84. D. Power bandwidth85. D. Negative86. D. 10% to 90% of maximum

87. A. Positive feedback88. C. Negative89. B. Noise voltage in resistors90. B. Vary the capacitance91. A. At low frequencies92. C. voltage-controlled93. C. Between 0 and -90 degrees94. A. Optimum95. B. Lead circuit96. C. Negative97. A. Between 0 and +90 degrees98. C. A parallel LC network99. D. 4.08 MHz100. D. High

Section 6Operational Amplifiers (Op-Amps)

Quiz 271. C. Two times either collector

current2. A. infinite3. C. 200 millivolts4. B. Zero5. A. 0 6. B. Summing amplifier7. C. 105to 1098. A. Difference between two base

currents9. C. Astable multi-vibrators10. B. Sum of two emitter currents11. C. the gain is 212. C. II, III, and IV13. C. An output error voltage usually

exists


37/47





906 0220 / 0921 674 4326 / 0927 843 8742 / 0923 621 3233


14. A. 10-515. A. summing of signals occurs at

only the inverting input16. B. Difference in collector resistors17. D. 018. B. I, II, and III19. C. Both inputs20. D. differential21. A. I, II, and IV22. C. operational transconductance

amplifier23. B. Smaller than voltage gain24. D. all of these25. C. Megaohms26. A. Diff amp27. D. a bias current28. B. I, II, and III

29. A. voltage-to-current amplifier30. D. slew rate31. B. Current source32. A. Very high output power33. A. CMRR34. C. The same35. C. the transconductance and the

load resistor36. C. Produces an output voltage

that is the su

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