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email: [email protected] ÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019 - (Numerical Value Type) Q.No.(46-50) are numerical answer type questions. Maximum numerical value is lmited to 4 numerical digits. In case of decimals, answer may be corrected to the second decimal. 4 marks for a correct attempt. No negative marks for a wrong attempt. 46. Let S = {2, 1, 1, 2} If x, y, z S then the number of integer points on x 2 , y 2 , z 2 = 9 must be 1 2 1 2 47. The value of + + + + .... terms 7 7 2 7 3 7 4 1 48. If (x) = x +. 1 2x + 1 2x + 2x + .... Then compute the value of (100). (100) = 49. Let (x + 10) 50 + (x 10) 50 = a 0 +a 1 x + a 2 x 2 a 2 + ...... + a 50 x 50 for all x R then = a 0 50. 11 (x) = (x) and g(x) = 1 (x) and F(x) = x 2 x 2 [ ( ) ] + [ g ( ) ] and given that F(5) = 5 2 2 then F(10) = Physics (Single Correct Answer Type) Q.No.(51-70) are multiple option questions. Mark only one correct option. 4 marks for a correct marking. 1 mark for a wrong marking. 51. In the relation P = (e az/k ); P is pressure Z is distance, k is boltzman constant and is the temperature then the dimensions of will be 1) [L 2 T 2 ] 2) [ML 2 T] 3) [MT 1 ] 4) [L 2 ] 52. A Boat which has a speed of 5 kmph in still water crosses a river of width 1 km along the shortest possible path in 15 min the velocity of the river water in kmph is 1) 3 2) 1 3) 4 4) 41 53. A block of mass 2 kg rests on a rough inclined plane making an angle of 30 with the horizontal. The frictional force on the block is ( s = 0.7) 1) 4.9 N 2) 9.8 N 3) 0.7 9.8 3 N 4) 9.8 3 N 54. A bob of mass M is suspended by a mass- less string of length L. The horizontal velocity at lowest position is 'v' is just suffi- cient to make it reach the highest point the angle at which the speed of the bob is half that at lowest point satisfies 1) = 2) < < 4 4 2 3 3 3) < < 4) < < 2 4 4 55. The ratio of earths orbital angular momen- tum about sun to its mass is 4.4 10 15 m 2 / s. The area enclosed by earths orbit is nearly 1) 7 10 22 m 2 2) 5 10 22 m 2 3) 3 10 22 m 2 4) 10 22 m 2 56. Function x = A sin 2 wt + B cos 2 wt + C sin wt cos wt represents S.H.M 1) for any value of A, B and C (except C = 0) 2) If A = B; C = 0 3) If A = B; C = 2B; amplitude = B 2 4) If A = B; C = 2B, amplitude = B 3 57. Water is filled in a cylindrical container to a height of 3 m, the ratio of the cross sec- tional area of the orifice and the beaker is 0.1. The orifice is at a height of 52.5 cm from the bottom. The speed of the liquid comes out of the orifice is (g = 10 m/s) 1) 5.25 m/s 2) 25 m/s 3) 50 m/s 4) 52.5 m/s 58. 300 gm of water at 25 C is added to 100 gm of ice at 0C. Final temperature of the mixture is 1) 10C 2) 0C 3) 25C 4) 5C 59. The plots of intensity versus wave length for three black bodies at T 1 , T 2 , T 3 , K respectively are as shown then 1) T 1 < T 2 < T 3 2) T 1 = T 2 = T 3 3) T 1 > T 3 > T 2 4) T 1 < T 3 > T 2 60. In Youngs double slit experiment intensity at a point is 1 4 of the maximum Intensity angular position of the point is 1) sin 1 ( ) 2) sin 1 ( ) d 2d 3) sin 1 ( ) 4) sin 1 ( ) 3d 4d 61. In the following circuit the reading on the ideal voltmeter (E = 5V and r = 0.2 5 1) 5V 2) 0 3) V 4) 35 V 8 62. What is the resistance of the resistor? 1) 350 10 3 5% 2) 35 10 3 5% 3) 3.5 10 3 5% 4) 3.5 10 6 5% 63. An element i = xi ^ is placed at the origin and carries a large current 10 A. What is the magnetic field on the Yaxis at a distance of 0.5 m (x = 1cm) 1) (4 10 8 )i ^ Tesla 2) (4 10 8 )k ^ Tesla 3) (4 10 8 ) j ^ Tesla 4) (4 10 8 )k ^ Tesla 64. A pure inductor of 25 mH connected to a source of 220 V and 50 Hz then the cur- rent in the circuit 1) 1.4 A 2) 2.8 A 3) 14 A 4) 28 A 65. The magnetic field in a plane electromag- netic wave is given by 10 3 3 B y = 2 10 7 sin [ x + 10 11 t ] T 2 2 then the expression for electric field 10 3 3 1) E z = 60 sin [ x + 10 11 t ] V/m 2 2 10 3 3 2) E x = 60 sin [ x + 10 11 t ] V/m 2 2 10 3 3 3) E y = 60 sin [ x + 10 11 t ] V/m 2 2 10 3 10 11 4) E z = 60 sin [ x + t ] V/m 2 2 66. The work function of caesium is 2.14 eV. Then the threshold frequency is .............. 10 14 Hz 1) 4.16 2) 5.16 3) 3.16 4) 51.6 67. De broglis wavelength associated with an electron accelerated through a P.D of 100 V 1) 0.123 mm 2) 0.123 m 3) 0.123 nm 4) 0.123 A 68. The half life of 92 U 235 under going - decay is 4.5 10 9 years. What is the activity of 1gm of 92 U 235 1) 1.23 10 4 Bq 2) 1.23 10 3 Bq 3) 1.23 10 2 Bq 4) 1.23 Bq 69. The I - V characteristics of LED 1) 2) 3) 4) 70. 92 U 238 82 Pb 206 given how many particles. 1) = 6, = 6 2) = 6, = 8 3) = 8, = 6 4) = 8, = 8 (Numerical Value Type) Q.No.(71-75) are numerical answer type questions. Maximum numerical value is limit- ed to 4 numerical digits. In case of decimals, answer may be corrected to the second decimal. 4 marks for a correct attempt. No negative marks for a wrong attempt. 71. A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mw. The final momentum of the object is ...... 10 17 kgm/s 72. The pressure of a medium is changed from 1.01 10 5 pa to 1.165 10 5 pa and change in volume is 10% keeping temperature constant. The bulk modulus is....... 10 5 pa 73. A ray of light traveling in the direction 1 (i ^ + 3 j ^ ) is incident on a plane mirror 2 after reflection it travels along the direction 1 (i ^ 3 j ^ ) the angle of incidence is 2 .......... degree 74. A steel wire 0.72 m long has mass of 5 10 3 kg if the wire in under a tension of 60 N the speed of the Transverse wave on the wire 75. A transmitting antenna at the top of the tower has a height 32 m and the height of the receiving antenna is 50 m. What is the minimum distance between then for satis- factory communication in LOS mode. (R = 6.4 10 6 m) JEE Main - 2020 (January) Model Paper New Pattern sEìoæ¨ êŸô¢ªî¦ô³z I T 1 T 2 T 3 V Orange Green Silver Gold No. of Questions: 75 Max. Marks: 300 Time: 180 Minutes KEY (This Model Paper was prepared by Subject Experts of Sri Chaitanya IIT Academy, Andhra Pradesh, Telangana) QR Code ìª þ§\û à¶óŸªÙè…. öË¶ë¯ https://tinyurl.com/y 7ux6uqx LÙÚšíj Ú¨xÚ à¶óŸªÙè…. þ»õ«uù£ìx ÚÁú£Ù Red Yellow Blue R Y B R Y B I V O I V O I V O I V O CHEMISTRY 1-3; 2-3; 3-4; 4-3; 5-2; 6-3; 7-1; 8-1; 9-1; 10-2; 11-4; 12-4; 13-3; 14-1; 15-1; 16-4; 17-4; 18-1; 19-1; 20-1; 21-9; 22-6.9; 23-1; 24-0.86; 25-14 MATHS 26-1; 27-2; 28-3; 29-4; 30-3; 31-1; 32-3; 33-1; 34-3; 35-2; 36-1; 37-2; 38-1; 39-2; 40-3; 41-4; 42-4; 43-4; 44-2; 45-2; 46-24; 47-0.19; 48-100; 49-12.25; 50-5 PHYSICS 51-4; 52-1; 53-2; 54-4; 55-1; 56-3; 57-3; 58-2; 59-3; 60-3; 61-2; 62-1; 63-2; 64-4; 65-1; 66-2; 67-3; 68-1; 69-1; 70-3; 71-1; 72-1.55; 73- 30; 74-93; 75-45.5 l ÷ª®LÚ¥Ùø‹õª, vð§Ú©dúà GæÀò°uÙÚ l ví‡í£¸ôù£û NëůìÙ l ÷³Üuîμªiì ví£øŒoõª n ú£÷«ëůû¦õª l îμ«è[öËÀ ›íí£ô¢ªx l víˆNóŸªúà ›íí£ô¢ªx ÚÛ«uÎô ÚÁè þ§\û öË¶ë¯ https://tinyurl.com/y637z3bl https://tinyurl.com/tckw4d8 LÙÚÂõšíj Ú¨xÚ à¶óŸªÙè…. www.eenadupratibha.net çËμûÂh, ÏÙåô í£K¤Ûõ ÚÁú£Ù.. çËμûÂh ÏÙåô Ôíˆ, êμõÙÞ¥é ÏÙTxùÃ, êμõªÞœª Oªè…óŸªÙõö˺
Transcript
Page 1: ÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019 email: help@eenadupratibha ... · ÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019- email: help@eenadupratibha.net (Numerical Value

email: [email protected]÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019 -

(Numerical Value Type)

Q.No.(46-50) are numerical answer typequestions. Maximum numerical value is lmitedto 4 numerical digits. In case of decimals,answer may be corrected to the seconddecimal. 4 marks for a correct attempt. No negativemarks for a wrong attempt.46. Let S = {2, 1, 1, 2} If x, y, z S then the

number of integer points on x2, y2, z2 = 9must be

1 2 1 247. The value of + + + + .... terms7 72 73 74

148. If (x) = x +.

12x +

12x +

2x + ....Then compute the value of (100). (100) =

49. Let (x + 10)50 + (x 10)50 = a0 +a1x + a2x2

a2+ ...... + a50x50 for all x R then =a0

50. 11(x) = (x) and g(x) = 1(x) and F(x) =

x 2

x 2

[()] + [g()] and given that F(5) = 52 2

then F(10) =

Physics

(Single Correct Answer Type)

Q.No.(51-70) are multiple option questions.Mark only one correct option.

4 marks for a correct marking. 1 mark for awrong marking.

51. In the relationP = (eaz/k); P is pressure

Z is distance, k is boltzman constant and is the temperature then the dimensionsof will be

1) [L2T2] 2) [ML2T]3) [MT1] 4) [L2]

52. A Boat which has a speed of 5 kmph in stillwater crosses a river of width 1 km alongthe shortest possible path in 15 min thevelocity of the river water in kmph is

1) 3 2) 1 3) 4 4) 41

53. A block of mass 2 kg rests on a roughinclined plane making an angle of 30 withthe horizontal. The frictional force on theblock is ( s = 0.7)

1) 4.9 N 2) 9.8 N

3) 0.7 9.8 3 N 4) 9.8

3 N

54. A bob of mass M is suspended by a mass-less string of length L. The horizontalvelocity at lowest position is 'v' is just suffi-cient to make it reach the highest point theangle at which the speed of the bob ishalf that at lowest point satisfies

1) = 2) < < 4 4 2

3 33) < < 4) < < 2 4 4

55. The ratio of earths orbital angular momen-tum about sun to its mass is 4.4 1015m2/ s.The area enclosed by earths orbit isnearly

1) 7 1022 m2 2) 5 1022 m2

3) 3 1022 m2 4) 1022 m2

56. Function x = A sin2 wt + B cos2 wt + C sinwt cos wt represents S.H.M1) for any value of A, B and C (except C = 0)2) If A = B; C = 03) If A = B; C = 2B; amplitude = B

2

4) If A = B; C = 2B, amplitude = B3

57. Water is filled in a cylindrical container to aheight of 3 m, the ratio of the cross sec-tional area of the orifice and the beaker is0.1. The orifice is at a height of 52.5 cmfrom the bottom. The speed of the liquidcomes out of the orifice is (g = 10 m/s)1) 5.25 m/s 2)

25 m/s

3) 50 m/s 4)

52.5 m/s

58. 300 gm of water at 25C is added to 100gm of ice at 0C. Final temperature of themixture is1) 10C 2) 0C 3) 25C 4) 5C

59. The plots of intensity versus wave lengthfor three black bodies at T1, T2, T3, Krespectively are as shown then

1) T1 < T2 < T3 2) T1 = T2 = T3

3) T1 > T3 > T2 4) T1 < T3 > T2

60. In Youngs double slit experiment intensityat a point is 14 of the maximum Intensityangular position of the point is

1) sin1() 2) sin1()d 2d

3) sin1() 4) sin1()3d 4d

61. In the following circuit the reading on theideal voltmeter (E = 5V and r = 0.2

51) 5V 2) 0 3) V 4) 35 V8

62.

What is the resistance of the resistor?1) 350 103 5% 2) 35 103 5% 3) 3.5 103 5% 4) 3.5 106 5%

63. An element i = x i is placed at the originand carries a large current 10 A. What isthe magnetic field on the Yaxis at a distance of 0.5 m (x = 1cm)

1) (4 108)i Tesla 2) (4 108) k Tesla

3) (4 108) j Tesla 4) (4 108) k Tesla

64. A pure inductor of 25 mH connected to asource of 220 V and 50 Hz then the cur-rent in the circuit

1) 1.4 A 2) 2.8 A

3) 14 A 4) 28 A

65. The magnetic field in a plane electromag-netic wave is given by

103 3By = 2 107 sin [x + 1011t] T2 2

then the expression for electric field

103 31) Ez = 60 sin [x + 1011t] V/m

2 2

103 32) Ex = 60 sin [x + 1011t] V/m

2 2

103 33) Ey = 60 sin [x + 1011t] V/m

2 2

103 10114) Ez = 60 sin [x + t] V/m

2 266. The work function of caesium is 2.14 eV.

Then the threshold frequency is .............. 1014 Hz1) 4.16 2) 5.16 3) 3.16 4) 51.6

67. De broglis wavelength associated with anelectron accelerated through a P.D of 100 V1) 0.123 mm 2) 0.123 m3) 0.123 nm 4) 0.123 A

68. The half life of 92U235 under going - decay is 4.5 109 years. What is theactivity of 1gm of 92U235

1) 1.23 104 Bq 2) 1.23 103 Bq3) 1.23 102 Bq 4) 1.23 Bq

69. The I - V characteristics of LED

1) 2)

3) 4)

70. 92U238 82Pb206 given how many particles.1) = 6, = 6 2) = 6, = 83) = 8, = 6 4) = 8, = 8

(Numerical Value Type)

Q.No.(71-75) are numerical answer typequestions. Maximum numerical value is limit-ed to 4 numerical digits. In case of decimals,

answer may be corrected to the seconddecimal. 4 marks for a correct attempt. No negativemarks for a wrong attempt.71. A pulse of light of duration 100 ns is

absorbed completely by a small object initially at rest. Power of the pulse is 30 mw. The final momentum of the objectis ...... 1017 kgm/s

72. The pressure of a medium is changedfrom 1.01 105 pa to 1.165 105 pa andchange in volume is 10% keeping temperature constant. The bulk modulusis....... 105 pa

73. A ray of light traveling in the direction 1 (i +

3 j ) is incident on a plane mirror

2after reflection it travels along the direction1 (i

3 j ) the angle of incidence is

2 .......... degree

74. A steel wire 0.72 m long has mass of 5 103 kg if the wire in under a tension of60 N the speed of the Transverse wave onthe wire

75. A transmitting antenna at the top of thetower has a height 32 m and the height ofthe receiving antenna is 50 m. What is theminimum distance between then for satis-factory communication in LOS mode.

(R = 6.4 106 m)

JEE Main - 2020 (January)Model Paper

NewPattern

sEìoæ êŸô¢ªî¦ô³z

I T1T2

T3

V

Ora

nge

Gre

enSi

lver

Gold

No. of Questions: 75 Max. Marks: 300 Time: 180 Minutes

KEY

(This Model Paper was prepared by

Subject Experts of Sri Chaitanya IIT Academy,Andhra Pradesh, Telangana)

QR Code ìª þ§\ûÂà¶óŸªÙè…. ö˶ë¯https://tinyurl.com/y7ux6uqx LÙÚšíj Ú¨xÚÂà¶óŸªÙè….

þ»õ«uù£ìx ÚÁú£Ù

Red

Yel

low

Blu

e RYB

RYB

I

VO

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CHEMISTRY

1-3; 2-3; 3-4; 4-3; 5-2; 6-3; 7-1; 8-1; 9-1; 10-2; 11-4; 12-4; 13-3; 14-1; 15-1; 16-4; 17-4; 18-1; 19-1; 20-1; 21-9; 22-6.9; 23-1;24-0.86; 25-14

MATHS

26-1; 27-2; 28-3; 29-4; 30-3; 31-1; 32-3; 33-1; 34-3; 35-2; 36-1; 37-2; 38-1; 39-2; 40-3; 41-4; 42-4; 43-4; 44-2; 45-2; 46-24;47-0.19; 48-100; 49-12.25; 50-5PHYSICS

51-4; 52-1; 53-2; 54-4; 55-1; 56-3; 57-3; 58-2; 59-3; 60-3; 61-2; 62-1; 63-2; 64-4; 65-1; 66-2; 67-3; 68-1; 69-1; 70-3; 71-1; 72-1.55; 73- 30; 74-93; 75-45.5

l ÷ª®LÚ¥Ùø‹õª, vð§Ú©dúà GæÀò°uÙÚÂl ví‡í£¸ôù£û NëůìÙl ÷³Üuîμªiì ví£øŒoõª n ú£÷«ëůû¦õªl îμ«è[öËÀ ›íí£ô¢ªxl víˆNóŸªúà ›íí£ô¢ªxÚÛ«uÎô ÚÁè þ§\û öË¶ë¯ https://tinyurl.com/y637z3bl

https://tinyurl.com/tckw4d8

LÙÚÂõšíj Ú¨xÚ à¶óŸªÙè…. www.eenadupratibha.net

çËμûÂh, ÏÙåô í£K¤Ûõ ÚÁú£Ù..

çËμûÂh ÏÙåôÂÔíˆ, êμõÙÞ¥é

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Page 2: ÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019 email: help@eenadupratibha ... · ÷ªÙÞœüŒî¦ô¢Ù 12 ì÷Ùñô¢ª 2019- email: help@eenadupratibha.net (Numerical Value

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