Physics Chapter 22
Physics Chapter 22
- 1.
Which force binds atoms together to form molecules?
- A.
Gravitational
- B.
Nuclear
- C.
Electrical
- D.
Centripetal
- E.
None of these
Correct Answer
C. Electrical -
- 2.
The fundamental force underlying all chemical reactions is
- A.
Gravitational
- B.
Nuclear
- C.
Centripetal
- D.
Electrical
- E.
None of these
Correct Answer
D. Electrical -
- 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
Correct Answer
A. Electrons that surround the nucleus -
- 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
Correct Answer
C. Protons than electrons -
- 5.
Strip electrons from an atom and the atom become a
- A.
Positive ion
- B.
Negative ion
- C.
Different element
Correct Answer
A. Positive ion -
- 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
Correct Answer
B. Is a whole number multiple of the charge of one electron -
- 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
Correct Answer
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
Correct Answer
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
Correct Answer
B. Repel or attract -
- 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
Correct Answer
A. Close together -
- 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
Correct Answer
C. Both 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
Correct Answer
C. A semiconductor -
- 13.
Superconductors are noted for their
- A.
High electric resistance
- B.
Low electric resistance
- C.
Absence of electric resistance
Correct Answer
C. Absence of electric resistance -
- 14.
Rub electrons from your hair with a comb and the comb becomes
- A.
Negatively charged
- B.
Positively charge
Correct Answer
A. Negatively charged -
- 15.
An electron and a proton
- A.
Attract each other
- B.
Repel each other
Correct Answer
A. Attract 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
Correct Answer
B. The electrical repulsion -
- 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
Correct Answer
B. Discharge the structure to which it is attached. -
- 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
Correct Answer
B. Its charges have been rearranged -
- 19.
A balloon will stick to a wooden wall if the balloon is charged
- A.
Negatively
- B.
Positively
- C.
Either way
- D.
Neither way
Correct Answer
C. Either 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
Correct Answer
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
Correct Answer
C. Charge -
- 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
Correct Answer
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
Correct Answer
B. Becomes polarized -
- 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
Correct Answer
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
Correct Answer
A. Between the capacitor plates -
- 26.
When the distance between two charges is halved, the electrical force between the charges
- A.
Quadruples
- B.
Doubles
- C.
Halves
- D.
Is reduced by 1/4
- E.
None of these
Correct Answer
A. Quadruples -
- 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
Correct Answer
C. The same -
- 28.
If you comb your hair and the comb becomes positively charged, then your hair becomes
- A.
Positively charged
- B.
Negatively charged
- C.
Uncharged
Correct Answer
B. Negatively charged -
- 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
Correct Answer
D. Net charge has been created or destroyed -
- 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
Correct Answer
B. Repulsive interactions -
- 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
Correct Answer
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
Correct Answer
A. Positively charged -
- 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
Correct Answer
C. Both 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
Correct Answer
D. A proton -
- 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
Correct Answer
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
Correct Answer
B. 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
Correct Answer
B. 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.
Spread apart further
- C.
Do not move
Correct Answer
A. Fall closer together -
- 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
Correct Answer
C. Loosely bound -
- 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
Correct Answer
A. Steel -
- 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
Correct Answer
B. Voltage and a small potential energy -
- 42.
Normally a balloon charged to several thousand volts has a relatively small amount of
- A.
Charge
- B.
Energy
- C.
Both
- D.
Neither
Correct Answer
C. Both -
- 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
Correct Answer
A. Energy -
- 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
Correct Answer
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
Correct Answer
B. 0.11 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
Correct Answer
C. 4 N -
- 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
Correct Answer
B. 30 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
Correct Answer
C. F/2 -
- 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
Correct Answer
A. F -
- 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
Correct Answer
E. None of these -
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