Download 1. An electron situated near another electron would feel an attractive

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Multiple Choice Questions - (45)
Topic: Effects of electric charge - (7)
Fill In The Blank Questions - (13)
Topic: Electric potential - (13)
Odd Numbered - (29)
Topic: The electric field - (15)
Even Numbered - (29)
Topic: The electrostatic force: Coulomb's law - (13)
Accessibility: Keyboard Navigation - (41)
Type: Conceptual - (49)
Difficulty: Easy - (34)
Type: Definition - (7)
Difficulty: Hard - (6)
Type: Graphical - (4)
Difficulty: Medium - (17)
Type: Numerical - (8)
Topic: Conductors and insulators - (11)
1. An electron situated near another electron would feel
an attractive magnetic force.
an attractive electrical force.
a repulsive magnetic force.
→ a repulsive electrical force.
no forces from the other electron.
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Effects of electric charge
MC An electron situated near another electron w...
Type: Conceptual
2. Consider a proton and an electron placed near one another with no other objects close by. They would
accelerate away from each other.
→ accelerate toward each other.
remain motionless.
be pulled together at constant speed.
move away from each other at constant speed.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Effects of electric charge
MC Consider a proton and an electron placed nea...
Type: Conceptual
3. Compared to the magnitude of the charge on a proton, the magnitude of the electrical charge carried by an electron is
→ exactly the same.
about the same.
only 1/2 as large.
only 1/3 as large.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: Effects of electric charge
Type: Conceptual
Type: Definition
Multiple Choice Question
MC Compared to the magnitude of the charge on a...
4. The charge of a proton is due to
rapid spinning of the proton.
periodic pulsations of the surface of the proton.
the high density of the proton.
→ reasons physicists are not yet quite sure of, but they explain charge as a property of the proton.
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Effects of electric charge
MC The charge of a proton is due to
Type: Conceptual
5. Two equal positive charges are near each other. If we increase the amount of charge on just one of them, then
the electric field points toward the larger charge.
the strength of the electrical force on both decreases.
→ the electric field at the position of the smaller charge increases.
the larger charge feels a stronger electrical force and the other a weaker electrical force.
Multiple Choice Question
MC Two equal positive charges are near each oth...
6. A typical, neutrally charged atom has
→ just as many electrons as protons.
no neutrons in the nucleus.
more protons than electrons.
as many electrons as protons and neutrons combined.
at least 1 neutron.
Accessibility: Keyboard Navigation
Difficulty: Medium
Topic: The electric field
Type: Conceptual
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Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Effects of electric charge
MC An atom has
Type: Conceptual
7. A strip of fur is rubbed against a hard rubber rod. The rod thereby acquires a negative charge because
electrons from the air molecules are transferred to the rod.
frictional forces create electrons.
→ rubbing caused electrons to move from the fur to the rod.
friction caused protons to be removed from the rod.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: Effects of electric charge
Type: Conceptual
Multiple Choice Question
MC A strip of fur is rubbed against a hard rubb...
8. The electrical force between two charged objects depends on
the number of electrons in the objects.
the total number of protons in both objects.
the sum of the net charges on the objects.
→ the product of the net charge on each of the two objects.
just the magnitude of the largest charge.
Multiple Choice Question
MC The electrical force between two charged obj...
9. The electrical force between any two charged objects is
always attractive.
always repulsive.
→ dependent on the sign of the charge on each object.
always balanced by the action-reaction forces.
Multiple Choice Question
MC The electrical force between any two charged...
10. Our model for explaining the electrical interaction between charged objects
→ postulates that an electric field surrounds each charged object.
makes sense only at very high speeds.
depends on the existence of three kinds of charge.
depends very strongly on the mass of the two objects.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: The electrostatic force: Coulomb's law
Type: Conceptual
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: The electrostatic force: Coulomb's law
Type: Conceptual
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electric field
MC Our model for explaining the electrical inte...
Type: Conceptual
11. If the distance between two spherical charged objects decreases by a factor of two, then the electrical force between the
objects
decreases by a factor of four.
→ increases by a factor of four.
is half as big.
doubles.
does not change.
Multiple Choice Question
MC If the distance between two spherical charge...
12. The electric field created by a moving negative charge
points away from the charge.
describes concentric circles about the direction of motion.
points in the direction of motion.
points in the direction opposite to the velocity.
→ points toward the charge.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: The electrostatic force: Coulomb's law
Type: Conceptual
Multiple Choice Question
MC The electric field created by a moving negat...
13. If the potential at point A is one volt it means that
→ a charge at A has potential energy one joule for each coulomb of charge.
Accessibility: Keyboard Navigation
Difficulty: Medium
Topic: The electric field
Type: Conceptual
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an object at A has charge equal to one coulomb.
an electron at A can perform one Joule of work.
there is a small battery present.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: Electric potential
Multiple Choice Question
Type: Conceptual
MC If the potential at point A is one volt it m...
Type: Definition
14. A metallic object has a net charge on it. For steady state conditions, the excess charge is
spread evenly throughout the object.
in the center of the object.
→ only on the surface.
on the bottom of the object.
on the north side of the object.
Multiple Choice Question
MC A metallic object has a net charge on it. Fo...
15. After a glass rod is rubbed with a nylon cloth
both the rod and cloth will have a positive charge.
→ the rod will have a positive charge and the cloth negative.
the rod will have a negative charge and the cloth positive.
both the rod and cloth will have a negative charge.
the rod will have a negative charge and the cloth will be neutral.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: Conductors and insulators
Type: Conceptual
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Conductors and insulators
MC After a glass rod is rubbed with a nylon clo...
Type: Conceptual
16. A rubber rod is rubbed with fur, so that the fur becomes positive. The rod is then used to charge an electroscope. The
charge on the electroscope will be
negative if charged by polarization.
positive if charged by contact.
negative if charged by induction.
→ positive if charged by induction.
neutral.
Accessibility: Keyboard Navigation
Difficulty: Hard
Multiple Choice Question
Topic: Conductors and insulators
MC A rubber rod is rubbed with fur, so that the...
Type: Conceptual
17. A positively charged rod is brought close to an uncharged electroscope. While the rod is close, one's finger touches the far
side of the metal ball on the electroscope. The finger is removed and then the rod is taken away. The electroscope is
→ negatively charged.
positively charged.
uncharged.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Conductors and insulators
MC A positively charged rod is brought close to...
Type: Conceptual
18. A negatively charged rod is brought close to an uncharged electroscope. While the rod is close one's finger touches the far
side of the metal ball on the electroscope. After the charged rod has been removed the finger is removed. The electroscope
is
negatively charged.
positively charged.
→ uncharged.
Accessibility: Keyboard Navigation
Difficulty: Medium
Topic: Conductors and insulators
Type: Conceptual
Multiple Choice Question
MC A negatively charged rod is brought close to...
19. Comparing the electrostatic force and the gravitational force we can say that
both have the same dependence on distance, both involve attraction and repulsion, but the gravitational force
is stronger.
both have the same dependence on distance, both involve attraction and repulsion, but the electrostatic force is
stronger.
both have the same dependence on distance, the electrostatic force can be either attractive or repulsive while
→
the gravitational force is only attractive, and the electrostatic force is stronger.
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both have the same dependence on distance, the electrostatic force can be either attractive or repulsive while
the gravitational force is only repulsive, and the electrostatic force is weaker.
the electrostatic force falls off more rapidly with distance, the electrostatic force can be either attractive or
repulsive while gravitation is only attractive, and the electrostatic force is stronger.
Accessibility: Keyboard Navigation
Difficulty: Hard
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC Comparing the electrostatic force and the gr...
Type: Conceptual
20. A 10 µC charge is at the origin. A -15 µC charge is on the x-axis 10 cm to the right of the origin. At what point other than
at infinity can a 1 µC charge be placed so that there will be no net electrostatic force on it?
→ At one point on the x-axis to the left of the positive charge.
At some point off the x-axis either above or below.
At one point between the two charges.
At one point on the x-axis to the right of the negative charge.
At no point.
Accessibility: Keyboard Navigation
Difficulty: Hard
Topic: The electrostatic force: Coulomb's law
Type: Conceptual
Multiple Choice Question
MC A 10 µC charge is at the origin. A -15...
21. Two equal charges repel one another with a force of 4.0 × 10-4 N when they are 10 cm apart. (Coulomb's constant is k =
9.0 × 109 N·m2/C2.) If they are moved until the separation is 5 cm, the repulsive force will be
0.25 × 10-4 N.
1.0 × 10-4 N.
4.0 × 10-4 N.
→
16 × 10-4 N.
64 × 10-4 N.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC Two equal charges repel one another with a ...
Type: Numerical
22. A positive charge is fixed at the origin. A negative charge is moved along the x-axis from x = 50 cm to x = 10 cm. The
potential energy of the negative charge
does not change.
→ decreases.
increases.
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Electric potential
MC A positive charge is fixed at the origin. A ...
Type: Conceptual
23. Imagine four equal positive charges, q, placed on points of a circle of radius r at the 3, 6, 9, and 12 o'clock positions.
Coulomb's constant is k. The magnitude of the electric field at the center of the circle is given by
4 kq/r.
4 kq/r2.
kq/r.
→
kq/r2.
zero.
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC Imagine four equal positive charges, q, plac...
Type: Conceptual
24. Three equal negative charges are placed at three of the four corners of a square. The direction of the electric field at the
remaining corner of the square is
along a side of the square toward one of the charges.
along a side of the square away from one of the charges.
→ along the line connecting this corner with the opposite corner, and toward that corner.
along the line connecting this corner with the opposite corner, but away from that corner.
no direction, zero field.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC Three equal negative charges are placed at t...
Type: Conceptual
25. A uniform electric field has a magnitude of 10 N/C and is directed upward. A charge brought into the field experiences a
force of 2.0 N upward. The charge must be
+20 C.
-20 C.
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→
+0.2 C.
-0.2 C.
-2.0 C.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: The electric field
MC A uniform electric field has a magnitude of ...
Type: Numerical
26. A capacitor consisting of two parallel plates separated by 2.0 cm has a potential of 40 V on the top plate and a potential of
0 V on the bottom plate. The electric field in the middle is
→ 2000 N/C, downward.
80 N/C, upward.
40 N/C, downward.
20 N/C, upward.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Electric potential
MC A capacitor consisting of two parallel plate...
Type: Numerical
27. A capacitor consisting of two separated parallel horizontal plates has a uniform electric field directed upward. If a negative
charge is placed exactly midway between the two plates, it will
be accelerated upward.
→ be accelerated downward.
remain at rest.
be accelerated to the right.
be accelerated to the left.
Multiple Choice Question
MC A capacitor consisting of two separated para...
28. The unit for electric field, N/C, can be written equivalently as
→ V/M.
C/V.
V/C.
M/V.
V.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: The electric field
Type: Conceptual
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: The electric field
Multiple Choice Question
Type: Conceptual
MC The unit for electric field, N/C, can be wri...
Type: Definition
29. Two charges are shown below. What is the direction of the electric field at the indicated point?
→
A
B
C
D
E
Difficulty: Medium
Topic: The electric field
Multiple Choice Question
Type: Conceptual
MC Two charges are shown below. What is the dir...
Type: Graphical
30. When you shuffle your feet on a carpet on a dry day, you can accumulate a charge. The fact that you accumulate a charge
means that the carpet is
→ an insulator, because if it weren't, the charge would immediately leave you.
an insulator, because only insulators can be charged by contact.
a conductor, because charge cannot leave an insulator and move to you.
a conductor, because conductors always have extra electrons.
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Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Conductors and insulators
MC When you shuffle your feet on a carpet on a ...
Type: Conceptual
31. Two charges of equal magnitude but opposite sign are 10 cm apart. The potential is largest
halfway between the two charges.
→ close to the positive charge.
close to the negative charge.
far away from the two charges.
Multiple Choice Question
MC Two charges of equal magnitude but opposite ...
32. A charged comb attracts bits of neutral dust in the air. This happens because
→ the dust becomes polarized.
the dust grounds the comb.
the dust becomes charged by induction.
the dust is a good conductor.
Accessibility: Keyboard Navigation
Difficulty: Easy
Topic: Electric potential
Type: Conceptual
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Effects of electric charge
MC A charged comb attracts bits of neutral dust...
Type: Conceptual
33. A point charge creates the electric field shown. At which of the points would the potential energy of a positive test charge
have the largest value?
→
A
B
C
D
Difficulty: Easy
Topic: Electric potential
Type: Conceptual
Type: Graphical
Multiple Choice Question
MC A point charge creates the electric field sh...
34. If two metal balls each have a charge of -10-6 C and the repulsive force between them is 1 N, how far apart are they?
(Coulomb's constant is k = 9.0 × 109 N·m2/C2.)
9.5 m
9.0 mm
→ 9.5 cm
0.9 m
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC If two metal balls each have a charge of -10...
Type: Numerical
35. The most common form of lightning strike from a cloud to the ground involves negative charge moving from the cloud to
the ground. Just before a lightning strike,
→ the electric field must point toward the sky.
the potential energy of the electrons in the cloud must be small.
the potential must be larger near the cloud.
there are no charges on the ground.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Electric potential
MC The most common form of lightning strike fro...
Type: Conceptual
36. Consider the field lines of the electric dipole in this diagram, relative to the w-axis and the z-axis.
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In which direction does the electric field point where the two axes intersect?
45° up and to the right, parallel to the z-axis:
45° down and to the right, parallel to the w-axis:
45° down and to the left, parallel to the z-axis:
→
45° up and to the left, parallel to the w-axis:
Multiple Choice Question
MC Consider the field lines of the electric dip...
Difficulty: Easy
Topic: The electric field
Type: Conceptual
Type: Graphical
Reference: 12_01
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37. Refer to the dipole in the z, w coordinate system above. Consider the electric field at a point α out on the z-axis, above and
to the right of the intersection of the axes. In which direction does the electric field point at point α?
45° down and to the right, parallel to the w-axis:
45° up and to the right, parallel to the z-axis:
→
45° up and to the left, parallel to the w-axis:
45° down and to the left, parallel to the z-axis:
Difficulty: Medium
Multiple Choice Question
Topic: The electric field
Reference: 12_01
Type: Conceptual
MC Refer to the dipole in the z, w coordinate ...
Type: Graphical
38. You have a pair of horizontal parallel plates, with the positive plate above and the negative plate below. How will the lines
of constant potential be arranged in this perspective?
Spherically, since all charges are either electrons or protons.
→ Horizontally.
Vertically.
Accessibility: Keyboard Navigation
Difficulty: Hard
Multiple Choice Question
Topic: Electric potential
MC You have a pair of horizontal parallel plate...
Type: Conceptual
39. Consider the horizontal parallel plates. The upper plate has a voltage difference of 30 V with the lower plate, and they are
separated by 3 cm. You move the two plates carefully to a separation of 4 cm. What is the strength of the electric field
between the plates?
3000 volts/meter
1000 volts/meter
→ 750 volts/meter
7.5 volts/meter
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electric field
MC Consider again the horizontal parallel plate...
Type: Numerical
40. As a given thundercloud's base elevation gets lower and lower, the possibility of lightning strike
→ is greater, because the electric field strength increases.
is less, since the electric field gets weaker.
is unchanged, because the thundercloud has not polarized.
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Multiple Choice Question
Accessibility: Keyboard Navigation
MC As a given thundercloud's base elevation...
Topic: The electric field
41. If the plates of a charged parallel plate capacitor were moved further apart, the potential energy of each of the charges on
the capacitor would
remain the same.
→ increase.
decrease.
increase or decrease depending on the initial plate separation.
Accessibility: Keyboard Navigation
Difficulty: Medium
Topic: Electric potential
Type: Conceptual
Multiple Choice Question
MC If the plates of a charged parallel plate ca...
42. If a charge of -3 × 10-6 C were allowed to fall through a potential difference of +500 V, the change in potential energy for
the charge would be
-1.5 × 10-4 Joules.
1.5 × 10-4 Joules.
→
-1.5 × 10-3 Joules.
1.5 × 10-3 Joules.
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: Electric potential
MC If a charge of -3 x 10-6 C were allowed to ...
Type: Numerical
43. Electrostatic precipitators can effectively remove most of which of the following air pollutants from a smoke stack
sulfur dioxide.
carbon monoxide.
nitrous oxides.
→ particulates.
Accessibility: Keyboard Navigation
Difficulty: Medium
Multiple Choice Question
Topic: Conductors and insulators
MC Electrostatic precipitators can effectively ...
Type: Conceptual
44. Two very small spherical metal objects, each with 1 Coulomb of charge, are brought together in a vacuum so that the
separation distance between their centers is 1 mm. What is the force of repulsion between the two object? (Coulomb's
constant is k = 9.0 × 109 N·m2/C2.)
9 × 1012 N
9 × 1013 N
9 × 1014 N
→
9 × 1015 N
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electrostatic force: Coulomb's law
MC Two spherical metal objects are brought tog...
Type: Numerical
45. To bring a negative charge from an infinitely great distance away into the presence of a positive charge would require a
____________________ amount of work to be done.
positive
→ negative
zero
Accessibility: Keyboard Navigation
Difficulty: Easy
Multiple Choice Question
Topic: The electric field
MC To bring a negative charge from an infinitel...
Type: Conceptual
46. A plastic rod is rubbed with fur. The rod is then touched to the metal knob of an electroscope. The sign of the charge on
the electroscope after contact is ___________________.
negative
Difficulty: Medium
Fill-in-the-Blank Question
Topic: Conductors and insulators
FB A plastic rod is rubbed with fur. The rod is...
Type: Conceptual
47. A glass rod is rubbed with nylon. The rod is then brought close to the metal knob of an electroscope. A person's finger
briefly touches the knob on the far side and is then removed. After the rod is removed the charge on the electroscope will
be _________.
negative
Fill-in-the-Blank Question
FB A glass rod is rubbed with nylon. The rod is...
48.
Difficulty: Medium
Topic: Conductors and insulators
Type: Conceptual
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A positive test charge is moved closer to a negative charge. The potential of the test charge _____________________
(indicate whether it increases, decreases, or stays the same).
decreases
Difficulty: Easy
Fill-in-the-Blank Question
Topic: Electric potential
FB A positive test charge is moved closer to a ...
Type: Conceptual
49. It is observed that a negatively charged grain of soot released between the parallel plates of a capacitor moves leftward.
The direction of the electric field between the capacitor plates is __________________.
rightward
Difficulty: Easy
Fill-in-the-Blank Question
Topic: The electric field
FB It is observed that a negatively charged gra...
Type: Conceptual
50. A negatively charged grain of soot released between the parallel plates of a capacitor moves leftward. The potential
between the parallel plates _________ (indicate whether it increases, decreases, or stays the same) from right to left, and
the potential energy of the negatively charged grain of soot _________________________ (indicate whether it increases,
decreases, or stays the same) from right to left.
increases/decreases
Difficulty: Hard
Fill-in-the-Blank Question
Topic: Electric potential
FB A negatively charged grain of soot released ...
Type: Conceptual
51. In a certain region of space, lines of constant positive electric potential get farther apart as one moves to the right. The
force on a negative charge in this region will point to the ____________________.
left
Difficulty: Hard
Fill-in-the-Blank Question
Topic: Electric potential
FB In a certain region, lines of constant poten...
Type: Conceptual
52. A drop of water dripping from the faucet in your kitchen is electrically neutral. A charged plastic hair comb can attract the
drips and drops by the process of __________________.
polarization
Difficulty: Easy
Fill-in-the-Blank Question
Topic: Conductors and insulators
FB A drop of water dripping from the faucet in ...
Type: Conceptual
53. Negative charges feel a force __________ (indicate direction) values of higher electric potentials.
toward
Difficulty: Easy
Topic: The electrostatic force: Coulomb's law
Fill-in-the-Blank Question
Type: Conceptual
FB Negative charges feel a force __________ (in...
Type: Definition
54. Four equal positive charges are placed at the corners of a square. The force on a +1 C charge placed at the center due to
any single charge is 10 N. The value of the electric field at the center due to all charges is ____________________ N/C.
zero
Difficulty: Easy
Topic: The electric field
Fill-in-the-Blank Question
Topic: The electrostatic force: Coulomb's law
FB Four equal positive charges are placed at th...
Type: Numerical
55. If a negatively charged rod is brought close to (but not touching) an initially neutral object, the object becomes polarized
and has ___________ charge.
no
Difficulty: Easy
Fill-in-the-Blank Question
Topic: Conductors and insulators
FB If a negatively charge rod is brought close ...
Type: Conceptual
56. A device used by Charles Coulomb to measure the presence or absence of electric charge is called a(n)
_____________________________.
electroscope
Fill-in-the-Blank Question
FB A device used by Charles Coulomb to measure ...
57. Electrical force per unit charge is known as the _______________________.
Difficulty: Easy
Topic: The electrostatic force: Coulomb's law
Type: Conceptual
Type: Definition
electric field
Difficulty: Easy
Topic: The electric field
Fill-in-the-Blank Question
Type: Conceptual
FB Electrical force per unit charge is know an ...
Type: Definition
58. The change in electrical potential energy per unit of charge that is moved from one place to another is known as
________________________.
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voltage difference
Fill-in-the-Blank Question
FB The change in electrical potential energy pe...
Difficulty: Easy
Topic: Electric potential
Type: Conceptual
Type: Definition