Spring review

Identify the following true statements?

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1. A proton is attracted to an electron

2. An electron is repelled by a neutron

3. A proton is repelled by another proton

4. Both protons and electrons are free to move around in metals

A charged rod is brought near but not touching two neutral conductors. Which arrangement describes the charges on the two spheres?

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1. + -2. - +3. - -4. + +

Which statements are true about conductors and insulators?

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1. Conductors are materials that allow both electrons and protons to freely move

2. The electrons on insulators are fixed in place

3. Conductors freely allow electrons to flow while insulators restrict their flow.

4. Insulators have different degrees of holding power

The charged conductor below could be charged by which of the processes

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1. Negative charge rod through induction

2. Positive charge rod through induction

3. Negative rod through conduction

4. Positive charge rod through conduction

A neutral conductor is placed on a positively charged insulator

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1. The conductor remains uncharged but the charge has been rearranged

2. The conductor has a positive charge

3. The conductor has a negative charge

Which of the following statements are true concerning grounding?

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25% 25%25%25%1. Negative charges move

to the earth to neutralize a Negatively charged object

2. Negative charges move from the earth to neutralize a Positivly charged object

3. An uncharged object becomes charged by the earth

4. Both 1 and 2

Which statement is true about an electric field?

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1. Are lines of force2. Represents the path a

positive test charge would move

3. Are strongest where the lines are closest

4. All of the above

An electron is placed in an electric field shown below, which of the following statements are true?

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-e

1. The electron is pulled to the left with increasing force

2. The electron is pulled to the right with increasing force

3. The electron is pulled to the right with decreasing force

Two identical charges experience a force F, are moved twice as far, what is the new force?

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1. F/42. F/23. F4. 2F5. 4F

Two identical charges experience a force F, are moved three times as close, the force is now?

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1. F/32. F/93. F4. 9F5. 3F

Three identical bulbs are connected in series which of the following is true?

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1. The current is the same

2. The voltage is the same

3. Both current and voltage is the same

Which of the following is true if the resistance for each bulb is different ?

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1. The current is the same but the voltage drop will change

2. The voltage drop is the same but the current changes

3. Both current and voltage is the same

If the resistance of each bulb increases B3 > B2> B1 What can be said about the current in each bulb ?

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1. I1=I2=I32. I3 >I2>I13. I3 <I2<I1

If the resistance of each bulb increases B3 > B2> B1 What can be said about the Voltage drop in each bulb ?

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1. V1=V2=V32. V3 >V2>V13. V3 <V2<V1

Which of the following is a correct expression for the equivalent resistance

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1. 1/[1/(R4 + R5 + R6)+1/(R2 + R3)] + R12. R1 + 1/(R2+R3) + 1/(R4 + R5 + R6)3. (R2xR3)/(R4+R5+R6) + R1

Which of the following statement describes the best way to hook up and ammeter and voltmeter?

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1. Ammeter in series and Voltmeter in parallel

2. Ammeter in series and voltmeter in series

3. Ammeter in parallel and voltmeter in series

Which of the following demonstrates the proper direction of the magnetic field induced by a current carrying wire?

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1. x2. x3. 4.

Which of following represents the correct magnetic field induced by a current carrying wire?

1 2 3. 4.

25% 25%25%25%1. x 2. x3. 4.

Which electromagnet shows the proper polarization?

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20% 20% 20%20%20%1. N S. + -2. N S

- +3.

S N - +

A positive charge ion moves to the right in a magnetic field into the page, what direction is the force acting on it?

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25% 25%25%25%1. Up2. Down 3. Left 4. Right

X X X X X X X X X X X X XX X X X X X X X X X X X X

What can be done to increase the speed of a motor?

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25% 25%25%25%1. Increase the current2. Increase the

magnetic field 3. Increase the loops

of wire 4. All of the above

The speed of a mechanical wave is dependent on

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25% 25%25%25%1. Wave legnth 2. Frequency 3. Period 4. Medium

Which of the following is not true about light

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25% 25%25%25%1. Light needs a medium to travel in

2. Light slows down in denser substances

3. Light travels the fastest in a vacuum

4. Light is a electromagnetic wave

Which of the following is not true about the refraction of light

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33% 33%33%1. When n1 < n2 light bends toward the normal

2. When n1 > n2 light bends toward the normal

3. When n1 > n2 light is refracted at all angles

For a given medium as the frequency goes up

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25% 25%25%25%1. The wave-length decreases

2. The wave-length increases

3. The speed increases 4. The speed

decreases