Question 1

Which of these has the greatest mass?

Accepted Answer

A) proton 
B) electron 
C) both of these 
D) neither of these 
A) proton 
B) electron 
C) both of these 
D) neither of these

Question 2

Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is

Accepted Answer

A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 3

Two charges that are 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 
A) 1 N. 
B) 2 N. 
C) 4 N. 
D) 8 N. 
E) none of the above

Question 4

The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron is

Accepted Answer

A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 5

In an electrically neutral atom the number of protons in the nucleus is equal to the number of

Accepted Answer

A) electrons that surround the nucleus. 
B) neutrons in the nucleus. 
C) both electrons and neutrons. 
D) none of the above 
A) electrons that surround the nucleus. 
B) neutrons in the nucleus. 
C) both electrons and neutrons. 
D) none of the above

Question 6

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is

Accepted Answer

A) 0.25 V. 
B) 0.5 V. 
C) 1 V. 
D) 2 V. 
E) 4 V. 
A) 0.25 V. 
B) 0.5 V. 
C) 1 V. 
D) 2 V. 
E) 4 V.

Question 7

Before a thunder storm, clouds in the sky likely become

Accepted Answer

A) conducting. 
B) polarized. 
C) grounded. 
D) a field-free region. 
A) conducting. 
B) polarized. 
C) grounded. 
D) a field-free region.

Question 8

The electrical force on a 2-C charge is 60 N. The electric field where the charge is located is

Accepted Answer

A) 20 N/C. 
B) 30 N/C. 
C) 60 N/C. 
D) 120 N/C. 
E) 240 N/C. 
A) 20 N/C. 
B) 30 N/C. 
C) 60 N/C. 
D) 120 N/C. 
E) 240 N/C.

Question 9

When the distance between two charges is halved, the electrical force between them

Accepted Answer

A) is reduced by 1/4. 
B) halves. 
C) doubles. 
D) quadruples. 
E) none of the above 
A) is reduced by 1/4. 
B) halves. 
C) doubles. 
D) quadruples. 
E) none of the above

Question 10

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

Accepted Answer

A) amount of external charge. 
B) volume of the dome. 
C) amount of charge and volume of the dome. 
D) none of the above 
A) amount of external charge. 
B) volume of the dome. 
C) amount of charge and volume of the dome. 
D) none of the above

Question 11

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

Accepted Answer

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

Question 12

An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is brought near the pith ball, without touching, the 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 
A) becomes charged by induction. 
B) becomes polarized. 
C) is repelled by the rod. 
D) is unaffected. 
E) none of the above

Question 13

A balloon will stick to a wooden wall if the balloon is charged

Accepted Answer

A) negatively. 
B) positively. 
C) either of these 
D) neither of these 
A) negatively. 
B) positively. 
C) either of these 
D) neither of these

Question 14

An electroscope is charged positively as indicated by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves become

Accepted Answer

A) closer together. 
B) farther apart. 
C) motionless. 
A) closer together. 
B) farther apart. 
C) motionless.

Question 15

Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is

Accepted Answer

A) gravitation. 
B) electrical. 
C) neither of these 
A) gravitation. 
B) electrical. 
C) neither of these

Question 16

The vast numbers of electrons in a coin don't fly off the surface because

Accepted Answer

A) mutual repulsion is incomplete. 
B) they are attracted by an equal number of protons. 
C) they are strongly bonded to their atoms. 
D) all of the above 
E) none of the above 
A) mutual repulsion is incomplete. 
B) they are attracted by an equal number of protons. 
C) they are strongly bonded to their atoms. 
D) all of the above 
E) none of the above

Question 17

Electric charge distributes itself on conducting surfaces

Accepted Answer

A) with greater concentration on more curved parts. 
B) such that the electric field inside is zero. 
C) both of the above 
D) none of the above 
A) with greater concentration on more curved parts. 
B) such that the electric field inside is zero. 
C) both of the above 
D) none of the above

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

A) positively charged. 
B) negatively charged. 
C) partially discharged. 
D) completely discharged. 
E) none of the above 
A) positively charged. 
B) negatively charged. 
C) partially discharged. 
D) completely discharged. 
E) none of the above

Question 20

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

Accepted Answer

A) charge. 
B) energy. 
C) both of these 
D) neither of these 
A) charge. 
B) energy. 
C) both of these 
D) neither of these

Exam 22: Electrostatics

Which of these has the greatest mass?

Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is

Two charges that are 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

The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron is

In an electrically neutral atom the number of protons in the nucleus is equal to the number of

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is

Before a thunder storm, clouds in the sky likely become

The electrical force on a 2-C charge is 60 N. The electric field where the charge is located is

When the distance between two charges is halved, the electrical force between them

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

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

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

A balloon will stick to a wooden wall if the balloon is charged

An electroscope is charged positively as indicated by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves become

Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is

The vast numbers of electrons in a coin don't fly off the surface because

Electric charge distributes itself on conducting surfaces

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

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

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

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