# Physics Chapter 22

58 Questions

Physics Chapter 22

• 1.
Which force binds atoms together to form molecules?
• A.

Gravitational

• B.

Nuclear

• C.

Electrical

• D.

Centripetal

• E.

None of these

• 2.
The fundamental force underlying all chemical reactions is
• A.

Gravitational

• B.

Nuclear

• C.

Centripetal

• D.

Electrical

• E.

None of these

• 3.
In an electrically neutral atom the number of protons in the nucleus is equal to the number of
• A.

Electrons that surround the nucleus

• B.

Neutrons in the nucleus

• C.

Both of these

• D.

Neither of these

• 4.
A positive ion has more
• A.

Electrons than neutrons

• B.

Electrons than protons

• C.

Protons than electrons

• D.

Protons than neutrons

• E.

Neutrons than protons

• 5.
Strip electrons from an atom and the atom become a
• A.

Positive ion

• B.

Negative ion

• C.

Different element

• 6.
To say that electric charge is quantized is to say that the charge on an object
• 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

• 7.
To say that electric charge is conserved is to say that electric charge
• 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

• 8.
The unit of electric charge, the coulomb, is the charge on
• A.

One electron

• B.

A specific large number of electrons

• 9.
A main difference between gravitational and electric forces is that electrical forces
• A.

Attract

• B.

Repel or attract

• C.

Obey the inverse-square law

• D.

Act over shorter distances

• E.

Are weaker

• 10.
The electrical force between charges is strongest when the charges are
• A.

Close together

• B.

Far apart

• C.

The electric force is constant everywhere

• 11.
The electrical force between charges depends on the
• A.

Magnitude of electric charges

• B.

Separation distance between electric charges

• C.

Both of these

• D.

None of these

• 12.
A transistor is an example of
• A.

A resistor

• B.

A superconductor

• C.

A semiconductor

• D.

A dry cell

• E.

Electrostatic shielding

• 13.
Superconductors are noted for their
• A.

High electric resistance

• B.

Low electric resistance

• C.

Absence of electric resistance

• 14.
Rub electrons from your hair with a comb and the comb becomes
• A.

Negatively charged

• B.

Positively charge

• 15.
An electron and a proton
• A.

Attract each other

• B.

Repel each other

• 16.
Two protons attract each other gravitationally and repel each other electrically. By far the greater is
• A.

The gravitational attraction

• B.

The electrical repulsion

• C.

Neither- they are the same

• 17.
The primary purpose of a lightning rod is to
• 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 within the structure to which it is attached a charge opposite to that of charged clouds overhead

• 18.
To say that an object is electrically polarized is to say
• 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

• 19.
A balloon will stick to a wooden wall if the balloon is charged
• A.

Negatively

• B.

Positively

• C.

Either way

• D.

Neither way

• 20.
When a car is struck by lightning, the resulting electric field inside the car is
• A.

Normally huge, but for 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

• 21.
Electric potential, measured in volts, is the ratio of electric energy to amount of electric
• A.

Current

• B.

Resistance

• C.

Charge

• D.

Voltage

• E.

None of these

• 22.
The electric field inside the dome of a Van de Graaff generator
• A.

Depends on the amount of charge on it

• B.

Depends on its size

• C.

Both of these

• D.

Neither of these

• 23.
An uncharged pitch ball is suspended by a nylon fiber. When a negatively charged rubber rod is brought nearby, without touching it, the pitch ball
• A.

Becomes charged by induction

• B.

Becomes polarized

• C.

Is repelled by the rod

• D.

All of these

• E.

None of these

• 24.
The net charge on a charged capacitor
• A.

Depends on the area of the capacitor plates

• B.

Depends on the distance between the capacitor plates

• C.

Depends on the medium between the capacitor plates

• D.

All of these

• E.

None of these- the net charge is zero

• 25.
Charges on the plates of a charged capacitor reside on the surfaces
• A.

Between the capacitor plates

• B.

Exterior to the capacitor

• 26.
When the distance between two charges is halved, the electrical force between the charges
• A.

• B.

Doubles

• C.

Halves

• D.

Is reduced by 1/4

• E.

None of these

• 27.
Particle A and particle B interact with each other. Particle A has twice the charge of particle B. Compared to the force on Particle A, the force on Particle B is
• A.

Four times as much

• B.

Two times as much

• C.

The same

• D.

Half as much

• E.

None of these

• 28.
If you comb your hair and the comb becomes positively charged, then your hair becomes
• A.

Positively charged

• B.

Negatively charged

• C.

Uncharged

• 29.
To say that electric charge is conserved means that no case has ever been found where
• 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 these

• 30.
A difference between electric forces and gravitational forces is that electrical forces include
• A.

Separation distance

• B.

Repulsive interactions

• C.

The inverse square law

• D.

Infinite range

• E.

None of these

• 31.
A conductor differs from an insulator in that a conductor
• A.

Has more electrons than protons

• B.

Has more protons than electrons

• C.

Has more energy than an insulator

• D.

Has faster moving molecules

• E.

None of these

• 32.
A negatively charged rod is brought near a metal can that rests on a wood table. you touch the opposite side of the can momentarily with your finger. The can is then
• A.

Positively charged

• B.

Negatively charged

• C.

Uncharged

• D.

Charged the same as it was

• 33.
Every proton in the universe is surrounded by its own
• A.

Electric field

• B.

Gravitational field

• C.

Both of these

• D.

Non of these

• 34.
The direction of an electric field is the direction of the force that it would exert on
• A.

A neutron

• B.

An electron

• C.

An atom

• D.

A proton

• E.

A molecule

• 35.
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
• A.

Half as much

• B.

The same

• C.

Twice as much

• D.

Four times as much

• E.

None of these

• 36.
If you use 10 J of work to push a coulomb of charge into an electric field, its voltage with respect to its starting position is
• A.

Less than 10 V

• B.

10 V

• C.

More then 10 V

• 37.
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
• A.

Less than 10 J

• B.

10 J

• C.

More than 10 J

• 38.
An electroscope is charged positively as shown by foil leaves that stand apart. as a negative charge is brought close tot he electroscope, the leaves
• A.

Fall closer together

• B.

• C.

Do not move

• 39.
Charge carriers in a metal are electrons rather than protons because electrons are
• A.

Negative

• B.

Smaller

• C.

Loosely bound

• D.

All of these

• E.

None of these

• 40.
To be safe in the unlikely case of a lightning strike, it is best to be inside a building framed with
• A.

Steel

• B.

Wood

• C.

Both the same

• 41.
A charged balloon neatly illustrates that something can have a great amount of
• A.

Potential energy and a low voltage

• B.

Voltage and a small potential energy

• C.

Both voltage and potential energy

• D.

None of these

• 42.
Normally a balloon charged to several thousand volts has a relatively small amount of
• A.

Charge

• B.

Energy

• C.

Both

• D.

Neither

• 43.
You can touch a 100,000- volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of
• A.

Energy

• B.

Electric field

• C.

Polarization

• D.

Conduction

• 44.
Two charges separated by one meter exert 1-N forces on each other if the charges are pulled to 3-m separation distance, the force on each charge will be
• A.

1 N

• B.

2 N

• C.

4 N

• D.

8 N

• E.

16 N

• 45.
Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be
• A.

0.33 N

• B.

0.11 N

• C.

0 N

• D.

3 N

• E.

9 N

• 46.
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
• A.

1 N

• B.

2 N

• C.

4 N

• D.

8 N

• E.

None of these

• 47.
The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?
• A.

20 N/C

• B.

30 N/C

• C.

60 N/C

• D.

120 N/C

• E.

240 N/C

• 48.
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
• A.

F

• B.

2F

• C.

F/2

• D.

F/4

• E.

None of these

• 49.
Two charged particles attract each other with a force F. If the charges of both particles are dubled, and the distance between them also doubled, then the force of attraction will be
• A.

F

• B.

2 F

• C.

F/2

• D.

F/4

• E.

None of these

• 50.
When a single charge q is placed on one corner of a square, the electric field at the center of the square is F/q. If three other equal charges are placed on the other corners, the electric field at the center of the square due to these four equal charges is
• A.

F/q

• B.

4F/q

• C.

F/(2q)

• D.

F/(4q)

• E.

None of these

• 51.
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
• A.

F/q

• B.

4F/q

• C.

F/(2q)

• D.

F(4q)

• E.

None of these

• 52.
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
• A.

0.25 V

• B.

0.5 V

• C.

1 V

• D.

2 V

• E.

4 V

• 53.
The electric field inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball is then
• A.

Less than zero.

• B.

Zero.

• C.

Greater than zero.

• 54.
Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have
• A.

The same sign

• B.

Opposite signs

• C.

Not enough information given

• 55.
Two charged particles held close to each other are released. As the particles move, the velocity of each increases. Therefore, their charges have
• A.

The same sign

• B.

Opposite signs

• C.

Not enough information given

• 56.
A positive charge and a negative charge held near each other are released.  As they move, the force on each particle
• A.

Increases

• B.

Decreases

• C.

Stays the same

• 57.
Two charged particles held near each other are released. As they move, the acceleration of each decreases.  Therefore, the particles have
• A.

The same sign

• B.

Opposite signs

• C.

Not enough information given

• 58.
A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?
• A.

Electron

• B.

Proton

• C.

Both accelerate equally

• D.

Neither accelerates

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