Question 1

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) none of the above 
A) electron 
B) proton 
C) both accelerate equally. 
D) none of the above

Question 2

The net charge on a charged capacitor depends on

Accepted Answer

A) the area of the capacitor plates. 
B) the distance between the capacitor plates. 
C) the medium between the capacitor plates. 
D) all of the above 
E) none of the above 
A) the area of the capacitor plates. 
B) the distance between the capacitor plates. 
C) the medium between the capacitor plates. 
D) all of the above 
E) none of the above

Question 3

Insulating materials are composed of atoms with

Accepted Answer

A) weak cohesive forces. 
B) tightly bound outer electrons. 
C) excess protons. 
D) vastly more charge than conductors. 
A) weak cohesive forces. 
B) tightly bound outer electrons. 
C) excess protons. 
D) vastly more charge than conductors.

Question 4

The direction of an electric field is the direction of the force exerted on

Accepted Answer

A) a neutral test charge. 
B) an electron. 
C) an atom. 
D) a proton. 
E) a molecule. 
A) a neutral test charge. 
B) an electron. 
C) an atom. 
D) a proton. 
E) a molecule.

Question 5

To say that an object becomes electrically polarized means that

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) none of the above 
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) none of the above

Question 6

Between a pair of equal and opposite charges, field lines are

Accepted Answer

A) directed from positive to negative. 
B) more concentrated closer to the charges. 
C) vectors, with patterns that stem from the inverse-square law. 
D) all of the above 
E) none of the above 
A) directed from positive to negative. 
B) more concentrated closer to the charges. 
C) vectors, with patterns that stem from the inverse-square law. 
D) all of the above 
E) none of the above

Question 7

A conductor differs from an insulator in that a conductor has more

Accepted Answer

A) electrons than protons. 
B) protons than electrons. 
C) energy than an insulator. 
D) faster moving molecules. 
E) none of the above 
A) electrons than protons. 
B) protons than electrons. 
C) energy than an insulator. 
D) faster moving molecules. 
E) none of the above

Question 8

To become a positive ion, an atom must

Accepted Answer

A) lose an electron. 
B) gain an electron. 
C) lose a proton. 
D) gain a proton. 
A) lose an electron. 
B) gain an electron. 
C) lose a proton. 
D) gain a proton.

Question 9

The force that binds atoms together to form molecules is

Accepted Answer

A) gravitational. 
B) nuclear. 
C) electrical. 
D) centripetal. 
E) none of the above 
A) gravitational. 
B) nuclear. 
C) electrical. 
D) centripetal. 
E) none of the above

Question 10

The electrical force between charges is strongest when the charges are

Accepted Answer

A) close together. 
B) far apart. 
C) either of these 
D) need more information 
A) close together. 
B) far apart. 
C) either of these 
D) need more information

Question 11

Every isolated proton in the universe is surrounded by its own

Accepted Answer

A) electric field. 
B) gravitational field. 
C) both of these 
D) neither of these 
A) electric field. 
B) gravitational field. 
C) both of these 
D) neither of these

Question 12

Much of the charge on a conducting cube is

Accepted Answer

A) uniformly spread over its surface. 
B) partly beneath the surface. 
C) mutually repelled toward its corners. 
D) none of the above 
A) uniformly spread over its surface. 
B) partly beneath the surface. 
C) mutually repelled toward its corners. 
D) none of the above

Question 13

It is said that electric charge is conserved, which means 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. 
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 14

The primary purpose of a lightning rod is to

Accepted Answer

A) attract lightning and guide it to the ground. 
B) discharge the structure to which it is attached. 
C) cancel the electric field within the structure to which it is attached. 
D) induce a charge opposite to that of charged clouds overhead. 
A) attract lightning and guide it to the ground. 
B) discharge the structure to which it is attached. 
C) cancel the electric field within the structure to which it is attached. 
D) induce a charge opposite to that of charged clouds overhead.

Question 15

To become a negative ion, an atom must

Accepted Answer

A) lose an electron. 
B) gain an electron. 
C) lose a proton. 
D) gain a proton. 
A) lose an electron. 
B) gain an electron. 
C) lose a proton. 
D) gain a proton.

Question 16

A positive charge and a negative charge held a certain distance apart are released. As they move, the force on each particle

Accepted Answer

A) increases. 
B) decreases. 
C) stays the same. 
A) increases. 
B) decreases. 
C) stays the same.

Question 17

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) small enough to be safe for a passenger inside. 
C) zero. 
A) normally huge, but for a brief time. 
B) small enough to be safe for a passenger inside. 
C) zero.

Question 18

Just as "gravity" is the study of a wide range of gravitational interactions, "electricity" is the study of a wide range of

Accepted Answer

A) electrical charges. 
B) electrical forces. 
C) electrical interactions. 
D) none of the above 
A) electrical charges. 
B) electrical forces. 
C) electrical interactions. 
D) none of the above

Question 19

The fundamental force underlying all chemical reactions is

Accepted Answer

A) gravitational. 
B) nuclear. 
C) centripetal. 
D) electrical. 
E) none of the above 
A) gravitational. 
B) nuclear. 
C) centripetal. 
D) electrical. 
E) none of the above

Question 20

Imagine a single charge q placed at one corner of a square, and that 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 (leaving the opposite corner "blank"), the electric field at the center of the square is

Accepted Answer

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

Exam 22: Electrostatics

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

The net charge on a charged capacitor depends on

Insulating materials are composed of atoms with

The direction of an electric field is the direction of the force exerted on

To say that an object becomes electrically polarized means that

Between a pair of equal and opposite charges, field lines are

A conductor differs from an insulator in that a conductor has more

To become a positive ion, an atom must

The force that binds atoms together to form molecules is

The electrical force between charges is strongest when the charges are

Every isolated proton in the universe is surrounded by its own

Much of the charge on a conducting cube is

It is said that electric charge is conserved, which means that electric charge

The primary purpose of a lightning rod is to

To become a negative ion, an atom must

A positive charge and a negative charge held a certain distance apart are released. As they move, the force on each particle

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

Just as "gravity" is the study of a wide range of gravitational interactions, "electricity" is the study of a wide range of

The fundamental force underlying all chemical reactions is

Imagine a single charge q placed at one corner of a square, and that 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 (leaving the opposite corner "blank"), the electric field at the center of the square is

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