Question 1

Moving electric charges will interact with

Accepted Answer

A)  an electric field.
B)  a magnetic field.
C)  both A and B
D)  none of the aboveE) C) and D)
F) B) and D)

Question 2

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

Accepted Answer

A)  attract.
B)  repel also.
C)  may attract or repel.D) A) and C)
E) A) and B)

Question 3

To say that electric charge is conserved is to say that electric charge

Accepted Answer

A)  may occur in an infinite variety of quantities.
B)  is a whole-number multiple of the charge of one electron.
C)  will interact with neighboring electric charges.
D)  can neither be created nor destroyed.E) A) and B)
F) All of the above D

Question 4

A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?

Accepted Answer

A)  the electron
B)  the proton
C)  Both accelerate equally.
D)  Neither accelerates.E) A) and D)
F) A) and C)

Question 5

Electrons are made to flow in a wire when there is

Accepted Answer

A)  an imbalance of charges in the wire.
B)  more potential energy at one end of the wire than the other.
C)  a potential difference across its ends.D) All of the above
E) None of the above

Question 6

When a 10-V battery is connected to a resistor, 2 A of current flow in the resistor. What is the resistor's value?

Accepted Answer

A)  2 ohms
B)  5 ohms
C)  10 ohms
D)  20 ohms
E)  more than 20 ohmsF) B) and E)
G) C) and D)

Question 7

Can an electron be set into motion and speeded up by a magnetic field? By an electric field?

Accepted Answer

An electron or any charged particle can ...

Question 8

Electrons move in an electrical circuit

Accepted Answer

A)  by being bumped by other electrons.
B)  by colliding with molecules.
C)  by interacting with an established electric field.
D)  because the wires are so thin.
E)  none of the aboveF) C) and D)
G) B) and E)

Question 9

To say that electric charge is conserved means that no case has ever been found where

Accepted Answer

A)  the total charge on an object has changed.
B)  the net amount of negative charge on an object is unbalanced by a positive charge on another object.
C)  the total amount of charge on an object has increased.
D)  net charge has been created or destroyed.
E)  none of the aboveF) A) and E)
G) C) and D)

Question 10

If you plug an electric toaster rated at 110-V into a 220-V outlet, current in the toaster will be about

Accepted Answer

A)  half what is should be.
B)  the same as if it were plugged into 110-V.
C)  more than twice what it should be.
D)  twice what it should be.E) A) and C)
F) B) and D)

Question 11

If you use 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is

Accepted Answer

A)  less than 10 J.
B)  10 J.
C)  more than 10 J.D) All of the above
E) B) and C)

Question 12

Electromagnetic induction occurs in a coil when there is a change in

Accepted Answer

A)  electric field intensity in the coil.
B)  magnetic field intensity in the coil.
C)  voltage in the coil.
D)  the coil's polarity.
E)  electromagnetic polarity.F) C) and D)
G) A) and D) B

Question 13

As more lamps are put into a parallel circuit, the overall current in the power source

Accepted Answer

A)  increases.
B)  decreases.
C)  stays the same.D) A) and C)
E) B) and C)

Question 14

Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is

Accepted Answer

A)  relatively small.
B)  equally huge.
C)  not enough information givenD) A) and B)
E) A) and C)

Question 15

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have

Accepted Answer

A)  more resistance.
B)  less resistance.
C)  the same resistance.D) All of the above
E) B) and C)

Question 16

When a pair of 1 ohm resistors are connected in series, their combined resistance is

Accepted Answer

A)  1 ohm, and when connected in parallel, 2 ohms.
B)  2 ohms, and when in parallel, 1 ohm.
C)  1/2 ohm, and when in parallel, 2 ohms.
D)  2 ohms, and when in parallel, 1/2 ohm.
E)  none of the aboveF) A) and E)
G) A) and D)

Question 17

Magnetic domains normally occur in

Accepted Answer

A)  iron.
B)  copper.
C)  silver.
D)  all of the above
E)  none of the aboveF) B) and C)
G) None of the above

Question 18

The headlights, radio, and defroster fan in an automobile are connected in

Accepted Answer

A)  series.
B)  parallel.C) A) and B)
D) undefined

Question 19

As more lamps are put into a series circuit, the overall current in the power source

Accepted Answer

A)  increases.
B)  decreases.
C)  stays the same.D) B) and C)
E) All of the above

Question 20

What correction do you make to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit.

Accepted Answer

You remind your friend of the conservation of energy. Although a transformer can step up or step down voltages and currents, no way can it do the same with energy. Energy can neither be created nor destroyed.

Exam 7: Electricity and Magnetism

Moving electric charges will interact with

Correct AnswerverifiedShow Answer

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

Correct AnswerverifiedShow Answer

To say that electric charge is conserved is to say that electric charge

Correct AnswerverifiedD

A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?

Correct AnswerverifiedShow Answer

Electrons are made to flow in a wire when there is

Correct AnswerverifiedShow Answer

When a 10-V battery is connected to a resistor, 2 A of current flow in the resistor. What is the resistor's value?

Correct AnswerverifiedShow Answer

Can an electron be set into motion and speeded up by a magnetic field? By an electric field?

Correct AnswerverifiedAn electron or any charged particle can ...View AnswerShow Answer

Electrons move in an electrical circuit

Correct AnswerverifiedShow Answer

To say that electric charge is conserved means that no case has ever been found where

Correct AnswerverifiedShow Answer

If you plug an electric toaster rated at 110-V into a 220-V outlet, current in the toaster will be about

Correct AnswerverifiedShow Answer

If you use 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is

Correct AnswerverifiedShow Answer

Electromagnetic induction occurs in a coil when there is a change in

Correct AnswerverifiedB

As more lamps are put into a parallel circuit, the overall current in the power source

Correct AnswerverifiedShow Answer

Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is

Correct AnswerverifiedShow Answer

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have

Correct AnswerverifiedShow Answer

When a pair of 1 ohm resistors are connected in series, their combined resistance is

Correct AnswerverifiedShow Answer

Magnetic domains normally occur in

Correct AnswerverifiedShow Answer

The headlights, radio, and defroster fan in an automobile are connected in

Correct AnswerverifiedShow Answer

As more lamps are put into a series circuit, the overall current in the power source

Correct AnswerverifiedShow Answer

What correction do you make to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit.

Correct AnswerverifiedYou remind your friend of the conservation of energy. Although a transformer can step up or step down voltages and currents, no way can it do the same with energy. Energy can neither be created nor destroyed.

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An electron or any charged particle can ...
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B

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You remind your friend of the conservation of energy. Although a transformer can step up or step down voltages and currents, no way can it do the same with energy. Energy can neither be created nor destroyed.