Question 1

Superconductors are noted for their

Accepted Answer

A)  high electric resistance.
B)  low electric resistance.
C)  absence of electric resistance.
D)  low cost.
E)  bright colors.

Question 2

Two charges separated by one meter exert 1-N forces on each other.If the magnitude of each charge is doubled,the force on each charge is

Accepted Answer

A)  1 N.
B)  2 N.
C)  4 N.
D)  8 N.
E)  None of the above choices are correct.

Question 3

The electric field inside the dome of a Van de Graaff generator

Accepted Answer

A)  depends on the amount of charge the outside of dome.
B)  depends on the volume of the dome
C)  Choices A and B are both correct.
D)  None of the above choices are correct.

Question 4

A transistor is an example of a

Accepted Answer

A)  resistor.
B)  superconductor.
C)  semiconductor.
D)  dry cell.
E)  transmitter. C

Question 5

The unit of electric charge,the coulomb,is the charge on

Accepted Answer

A)  one electron.
B)  a specific large number of electrons.
C)  a neutron.
D)  a specific number of neutrons.
E)  a quark. B

Question 6

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

Accepted Answer

A)  electron
B)  proton
C)  Both accelerate equally.
D)  Neither accelerates.

Question 7

To say that an object is electrically polarized is to say

Accepted Answer

A)  it is electrically charged.
B)  its charges have been rearranged.
C)  its internal electric field is zero.
D)  it is only partially conducting.
E)  it is to some degree magnetic.

Question 8

Every proton in the universe is surrounded by its own

Accepted Answer

A)  electric field and gravitational field.
B)  gravitational field.
C)  electric field
D)  None of the above choices are correct.

Question 9

A negatively charged rod is held near a metal can that rests on a dry wood table.If you touch the opposite side of the can momentarily with your finger,the can is then

Accepted Answer

A)  positively charged.
B)  negatively charged.
C)  partially discharged.
D)  completely discharged.
E)  discharged only on the side touched.

Question 10

Two charged particles held near each other are released.As they move,the acceleration of each decreases.Therefore,the particles have

Accepted Answer

A)  the same sign.
B)  opposite signs.
C)  not enough information given

Question 11

When a car is struck by lightning,the resulting electric field inside the car is

Accepted Answer

A)  normally huge,but for a brief time.
B)  normally huge for a time longer than the lightning stroke itself.
C)  small enough to be safe for an occupant inside.
D)  zero.

Question 12

A difference between electric forces and gravitational forces is that gravitational forces are not affected by

Accepted Answer

A)  separation distance.
B)  repulsive interaction.
C)  the inverse-square law.
D)  infinite range.
E)  None of the above choices are correct.

Question 13

Rub electrons from your hair with a comb and the comb becomes

Accepted Answer

A)  negatively charged.
B)  positively charged.
C)  discharged.

Question 14

Two charged particles repel each other with a force F.If the charge of one of the particles is doubled and the distance between them is also doubled,then the force will be

Accepted Answer

A)  F) 
B)  2 F.
C)  F/2.
D)  F/4.
E)  none of these

Question 15

Normally a small party balloon charged to several thousand volts will have a relatively small amount of

Accepted Answer

A)  charge and energy.
B)  energy.
C)  charge.
D)  neither charge nor energy.

Question 16

Use the following figure to answer the question: 
-A balloon will stick to a wooden wall if the balloon is charged

Accepted Answer

A)  negatively.
B)  positively.
C)  either positively or negatively.
D)  None of the above choices are correct.

Question 17

After a capacitor is fully charged,the total number of electrons it contains

Accepted Answer

A)  is slightly greater.
B)  is much greater.
C)  is slightly less.
D)  is much less.
E)  remains unchanged. E

Question 18

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 be neither created nor destroyed.
E)  is sometimes negative.

Question 19

When a single charge q is placed at one corner of a square,the electric field at the center of the square is F/q.If two other equal charges are placed at the adjacent corners of the square,the electric field at the center of the square due to these three equal charges is

Accepted Answer

A)  F/q.
B)  4F/q.
C)  F/(2q) .
D)  F/(4q) .
E)  None of the above choices are correct.

Question 20

An uncharged pith ball is suspended by a nylon fiber.When a negatively charged rubber rod is brought nearby,without touching it,the pith ball

Accepted Answer

A)  becomes charged by induction.
B)  becomes polarized.
C)  is repelled by the rod.
D)  is unaffected.
E)  None of the above choices are correct.

Exam 22: Electrostatics

Superconductors are noted for their

Correct AnswerverifiedShow Answer

Two charges separated by one meter exert 1-N forces on each other.If the magnitude of each charge is doubled,the force on each charge is

Correct AnswerverifiedShow Answer

The electric field inside the dome of a Van de Graaff generator

Correct AnswerverifiedShow Answer

A transistor is an example of a

Correct AnswerverifiedC

The unit of electric charge,the coulomb,is the charge on

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

To say that an object is electrically polarized is to say

Correct AnswerverifiedShow Answer

Every proton in the universe is surrounded by its own

Correct AnswerverifiedShow Answer

A negatively charged rod is held near a metal can that rests on a dry wood table.If you touch the opposite side of the can momentarily with your finger,the can is then

Correct AnswerverifiedShow Answer

Two charged particles held near each other are released.As they move,the acceleration of each decreases.Therefore,the particles have

Correct AnswerverifiedShow Answer

When a car is struck by lightning,the resulting electric field inside the car is

Correct AnswerverifiedShow Answer

A difference between electric forces and gravitational forces is that gravitational forces are not affected by

Correct AnswerverifiedShow Answer

Rub electrons from your hair with a comb and the comb becomes

Correct AnswerverifiedShow Answer

Two charged particles repel each other with a force F.If the charge of one of the particles is doubled and the distance between them is also doubled,then the force will be

Correct AnswerverifiedShow Answer

Normally a small party balloon charged to several thousand volts will have a relatively small amount of

Correct AnswerverifiedShow Answer

Use the following figure to answer the question: -A balloon will stick to a wooden wall if the balloon is charged

Correct AnswerverifiedShow Answer

After a capacitor is fully charged,the total number of electrons it contains

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

When a single charge q is placed at one corner of a square,the electric field at the center of the square is F/q.If two other equal charges are placed at the adjacent corners of the square,the electric field at the center of the square due to these three equal charges is

Correct AnswerverifiedShow Answer

An uncharged pith ball is suspended by a nylon fiber.When a negatively charged rubber rod is brought nearby,without touching it,the pith ball

Correct AnswerverifiedShow Answer

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B

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E

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