1. As a positively charged rod is brought near to but not
allowed to touch the knob of an uncharged electroscope, the
leaves will diverge because
(1) negative charges are transferred from the electroscope
to the rod
(2) negative charges are attracted to the knob of the
electroscope
(3) positive charges are repelled to the leaves of the
electroscope
(4) positive charges are transferred from the rod to the
electroscope
2. When an object is brought near the knob of a positively
charged electroscope, the leaves of the electroscope initially
diverge. The charge on the object
(1) must be zero
(3) must be negative
(2) must be positive
(4) cannot be determined
5. When a rod is brought near a neutral electroscope, the
leaves diverge. Which statement best describes the charge
on the rod?
(1) It must be positive.
(2) It must be negative.
(3) It may be neutral.
(4) It may be positive or negative.
6. A charged electroscope can detect
(1) positive charge, only
(2) negative charge, only
(3) either positive or negative charge
(4) neither positive nor negative charge
7. In the diagram below, a cloth is brought near, but does not
touch a neutral electroscope. The electroscope leaves
separate. What charge, if any, does the cloth have?
3. As shown in the diagram below, a charged rod is held near,
but not touching, a neutral electroscope.
(1) a positive charge
(2) a negative charge
The charge on the knob is
(1) positive and the leaves are positive
(2) positive and the leaves are negative
(3) negative and the leaves are positive
(4) negative and the leaves are negative
4. Which diagram best represents the charge distribution on a
neutral electroscope when a negatively charged rod is held
near it?
(1)
(3) an unknown charge
(4) no charge
8. An electroscope is a device with a metal knob, a metal
stem, and freely hanging metal leaves used to detect
charges. The diagram below shows a positively charged leaf
electroscope.
(3)
As a positively charged glass rod is brought near the knob
of the electroscope, the separation of the electroscope
leaves will
(1) decrease
(3) remain the same
(2) increase
(2)
(4)
9. The coulomb is a unit of
(1) resistance
(2) power
(3) charge
(4) force
10. A positively charged rod is held near the knob of a neutral
electroscope. Which diagram best represents the
distribution of charge on the electroscope?
(1)
12. When a positively charged body touches a neutral body, the
neutral body will
(1) gain protons
(3) gain electrons
(2) lose protons
(4) lose electrons
13. Which diagram best illustrates a neutral electroscope being
charged by conduction?
(1)
(3)
(2)
(2)
(4)
14. As shown in the diagram below, a neutral pith ball
suspended on a string is attracted to a positively charged
rod.
(3)
(4)
During contact with the rod, the pith ball
(1) loses electrons
(3) loses protons
(2) gains electrons
(4) gains protons
15. A positively charged object was used to give an
electroscope a negative charge. The electroscope
was charged by
(1) contact
(3) induction
(2) conduction
(4) reduction
11. Negatively charged rod A is used to charge rod B by
induction. Object C is then charged by direct contact with
rod B. The charge on object C is
(1) neutral
(2) positive
(3) negative
(4) not be able to be determined
16. If an uncharged electroscope is touched with a neutral
object, the separation of the leaves of the electroscope will
(1) decrease
(3) remain the same
(2) increase
17. A device commonly used to detect the presence of a static
electric charge is
(1) a galvanometer
(3) a compass
(2) a voltmeter
(4) an electroscope
18. Which procedure will give an electroscope a positive
charge?
(1) touching the electroscope with a neutral object
(2) bringing a positively charged object near the
electroscope
(3) touching the electroscope with a negatively charged
object
(4) touching the electroscope with a positively charged
object
19. Which diagram shows an electroscope that has been
charged by induction using a positive charging object?
(1)
(3)
(2)
(4)
Base your answers to questions 26 and 27 on the diagram below
which shows two identical metal spheres. Sphere A has a charge
of +12 coulombs and sphere B is a neutral sphere.
26. When spheres A and B are in contact, the total charge of the
system is
(1) neutral
(3) +12 C
(2) +6 C
(4) +24 C
27. After spheres A and B are separated, which graph best
represents the relationship of the force between the spheres
and their separation?
(1)
(3)
(2)
(4)
20. A glass rod becomes positively charged when it is rubbed
with silk. This net positive charge accumulates because the
glass rod
(1) gains electrons
(3) loses electrons
(2) gains protons
(4) loses protons
21. When a neutral metal sphere is charged by contact with a
positively charged glass rod, the sphere
(1) loses electrons
(3) loses protons
(2) gains electrons
(4) gains protons
22. A positively charged body must have
(1) an excess of neutrons
(3) a deficiency of protons
(2) an excess of electrons
(4) a deficiency of electrons
23. When a rubber rod is rubbed with fur, the rod becomes
negatively charged due to the transfer of
(1) electrons to the fur
(3) electrons to the rod
(2) protons to the fur
(4) protons to the rod
24. After a neutral object loses 2 electrons, it will have a net
charge of
(1) –2 elementary charges
(2) +2 elementary charges
(3) –3.2 × 10–19 elementary charge
(4) +3.2 × 10–19 elementary charge
25. A rod and a piece of cloth are rubbed together. If the rod
acquires a charge of +1 × 10–6 coulomb, the cloth acquires
a charge of.
(1) 0 C
(2) +1 × 10–6 C
(3) –1 × 10–6 C
(4) +1 × 106 C
28. Two neutral materials are rubbed together and there is a
transfer of electrical charge from one material to the other.
The net electrical charge for the system
(1) increases as electrons are transferred
(2) increases as protons are transferred
(3) remains constant as electrons are transferred
(4) remains constant as protons are transferred
29. When a plastic rod is rubbed with wool, the wool acquires a
positive charge because
(1) electrons are transferred from the wool to the rod
(2) protons are transferred from the wool to the rod
(3) electrons are transferred from the rod to the wool
(4) protons are transferred from the rod to the wool
30. Sphere A carries a charge of +2 coulombs and an identical
sphere B is neutral. If the spheres touch one another and
then are separated, the charge on sphere B would be
(1) +1 C
(3) 0 C
(2) +2 C
(4) +4 C
31. Two objects, A and B are rubbed together. If object A
acquires an excess of 100 electrons object B must have
(1) gained 100 electrons
(3) lost 100 electrons
(2) gained 100 protons
(4) lost 100 protons
Base your answers to questions 32 through 34 on the diagram
below which represents a system consisting of two charged metal
spheres with equal radii.
32. If the two spheres were touched together and then
separated, the charge on sphere A would be
(1) –6.0 × 10–4 C
(2) 2.0 × 10–4 C
(3) –3.0 × 10–4 C
(4) –8.0 × 10–4 C
33. If spheres A and B, as represented in the diagram, were
touched together and then separated, the net charge on the
two spheres would
(1) decrease
(3) remain the same
(2) increase
34. What is the magnitude of the electrostatic force exerted on
sphere A?
(1) 1.1 × 10–9 N
(2) 1.3 × 10–8 N
(3) 120 N
(4) 10. N
35. Which magnitude of charge could not be found on an
object?
(1) –0.8 × 10–19 C
(2) –1.6 × 10–19 C
(3) +1.6 × 10–19 C
(4) +3.2 × 10–19 C
36. Which electric charge is possible?
(1) 8.0 × 10–20 C
(2) 2.4 × 10–19 C
(3) 3.2 × 10–19 C
(4) 6.32 × 10–18 C
37. What is the charge of a proton?
(1) 9.1 × 10–31 C
(2) 1.7 × 10–27 C
(3) 1.6 × 10–19 C
(4) 6.3 × 1018 C
38. A sphere has a net excess charge of –4.8 x 10–19 coulomb.
The sphere must have an excess of
(1) 1 electron
(3) 3 electrons
(2) 1 proton
(4) 3 protons
39. Compared to the charge on a proton, the charge on an
electron has the
(1) opposite sign and a smaller magnitude
(2) opposite sign and same magnitude
(3) same sign and a smaller magnitude
(4) same sign and the same magnitude
40. An alpha particle consists of two protons and two neutrons.
The alpha particle's charge of +2 elementary charges is
equivalent to
(1) 8.0 × 10–20 C
(2) 3.2 × 10–19 C
(3) 1.2 × 1019 C
(4) 3.2 × 1019 C
41. An electrically neutral object can be attracted by a
positively charged object because
(1) like charges repel each other
(2) the charges on a neutral body can be redistributed
(3) the neutral body becomes charged by contact
(4) the net charge in a closed system varies
42. An uncharged metal sphere is placed midway between
spheres A and B represented in the diagram below.
Which diagram best represents the arrangement of the
charges in the uncharged sphere?
(1)
(3)
(2)
(4)
43. If a positively charged rod touches a neutral metal sphere,
the number of electrons on the rod will
(1) decrease
(3) remain the same
(2) increase
44. An object with + 10 elementary charges is grounded and
becomes neutral. What is the best explanation for this
occurrence?
(1) The object gained 10 electrons from the ground.
(2) The object lost 10 electrons to the ground
(3) The object gained 10 protons from the ground.
(4) The object lost 10 protons to the ground.
45. The diagram below shows four charged metal spheres
suspended by strings. The charge of each sphere is
indicated.
49. An inflated balloon which has been rubbed against a
person's hair is touched to a neutral wall and remains
attracted to it. Which diagram best represents the charge
distribution on the balloon and wall?
(1)
(3)
(2)
(4)
If spheres A, B, C, and D simultaneously come into contact,
the net charge on the four spheres will be
(1) + 1 C
(3) + 3 C
(2) + 2 C
(4) + 4 C
46. The diagram below shows the initial charge and position of
three identical metal spheres, X, Y, and Z, which have been
placed on insulating stands.
50. In the diagram below a neutral pith ball is suspended on a
string. A positively charged rod approaches the pith ball.
All three spheres are simultaneously brought into contact
with each other and then returned to their original positions.
Which statement best describes the charge of the spheres
after this procedure is completed?
(1) All the spheres are neutral.
(2) Each sphere has a net charge of +4 x 10–6 coulomb.
(3) Each sphere retains the same charge that it had
originally.
(4) Sphere Y has a greater charge than spheres X or Z.
47. A neutral rubber rod is rubbed with fur and acquires a
charge of –2 × 10–6 coulomb. The charge on the fur is
(1) +1 × 10–6 C
(2) +2 × 10–6 C
(3) –1 × 10–6 C
(4) –2 × 10–6 C
48. An electric force F exists between two charged spheres. If
the quantity of charge on each sphere is doubled, the
electric-force between the two spheres will be equal to
(1) F2
(2) 2F
(3) 3F
(4) 4F
The ball will first move toward
(1) A
(3) C
(2) B
(4) D
51. A balloon is rubbed against a student’s hair and then
touched to a wall. The balloon “sticks” to the wall due to
(1) electrostatic forces between the particles of the balloon
(2) magnetic forces between the particles of the wall
(3) electrostatic forces between the particles of the balloon
and the particles of the wall
(4) magnetic forces between the particles of the balloon
and the particles of the wall
52. Two electrically neutral metal spheres, A and B, on
insulating stands are placed in contact with each other. A
negatively charged rod is brought near, but does not touch
the spheres, as shown in the diagram below.
How are the spheres now charged?
(1) A is positive and B is positive.
(2) A is positive and B is negative.
(3) A is negative and B is positive.
(4) A is negative and B is negative.
56. The diagram below shows three neutral metal spheres, x, y,
and z, in contact and on insulating stands.
Which diagram best represents the charge distribution on
the spheres when a positively charged rod is brought near
sphere x, but does not touch it?
(1)
53. Base your answer to the following question on the
information and diagram below.
Two conducting spheres, A and B, are
separated by a distance of 2 meters between
centers. Sphere A has a charge of +2 × 10–4
coulomb, and sphere B has a charge of +6 × 10
–4
coulomb.
The force that these two spheres exert upon each other is
(1) 9.0 × 109 N
(2) 5.4 × 102 N
(3) 3.0 × 10–8 N
(4) 2.7 × 102 N
54. Two charges that are 2 meters apart repel each other with a
force of 2 × 10–5 Newton. If the distance between the
charges is decreased to 1 meter, the force of repulsion will
be
(1) 1 × 10–5 N
(2) 5 × 10–6 N
(3) 8 × 10–5 N
(4) 4 × 10–5 N
55. An electrostatic force of magnitude F exists between two
metal spheres having identical charge q. The distance
between their centers is r. Which combination of changes
would produce no change in the electrostatic force between
the spheres?
(1) doubling q on one sphere while doubling r
(2) doubling q on both spheres while doubling r
(3) doubling q on one sphere while halving r
(4) doubling q on both spheres while halving r
(2)
(3)
(4)
57. If the distance separating an electron and a proton is halved,
the magnitude of the electrostatic force between these
charged particles will be
(1) unchanged
(3) quartered
(2) doubled
(4) quadrupled
58. The diagram shows three small metal spheres with
different charges.
Compared to the force between spheres A and B, the force
between spheres B and C is
(1) one-quarter as great
(3) one-half as great
(2) twice as great
(4) four times as great
59. The diagram represents two charges, q1 and q2, separated by
a distance d.
Which change would produce the greatest increase in the
electrical force between the two charges?
(1) doubling charge ql, only
(2) doubling d, only
(3) doubling d and charge ql, only
(4) doubling d and charges q1 and q2
60. An electron is located 1.0 meter from a +2.0-coulomb
charge, as shown in the diagram below.
61. Base your answer to the following question on the diagram
below which represents two small charged spheres, A and B
, 3 meters apart. Each sphere has a charge of +2.0 × 10
–6
C.
If another small sphere with a charge of +2.0 x 10–6C is
placed at point y, the net force on this sphere will be
(1) 0 N
(3) 80. N
(2) 40. N
(4) 240 N
62. The diagram below shows two metal spheres suspended by
strings and separated by a distance of 3.0 meters. The
charge on sphere A is +5.0 × 10–4 coulomb and the charge
on sphere B is +3.0 × 10–5 coulomb.
Which statement best describes the electrical force between
the spheres?
(1) It has a magnitude of 15 N and is repulsive.
(2) It has a magnitude of 45 N and is repulsive.
(3) It has a magnitude of 15 N and is attractive.
(4) It has a magnitude of 45 N and is attractive.
63. The electrostatic force of attraction between two small
spheres that are 1.0 meter apart is F. If the distance between
the spheres is decreased to 0.5 meter, the electrostatic force
will then be
(1) F/2
(3) F/4
(2) 2F
(4) 4F
The electrostatic force acting on the electron is directed
toward point
(1) A
(3) C
(2) B
(4) D
64. The electrostatic force between two positive point charges
is F when the charges are 0.1 meter apart. When these point
charges are placed 0.05 meter apart, the electrostatic force
between them is
(1) 4F, and attracting
(3) 4F, and repelling
(2) F, and attracting
(4) F, and repelling
65. If the charge on each of two small spheres a fixed distance
apart is doubled, the force of attraction between the spheres
will be
(1) quartered
(3) halved
(2) doubled
(4) quadrupled
66. Which graph best represents the relationship between the
magnitude of the electric force between two identical
spheres possesing +1.0 coulomb of charge and –1.0
coulombs of charge respectivly, as well as the distance
between them?
(1)
(3)
(2)
(4)
67. The diagram below shows two metal spheres charged to
+1.0 × 10-6 coulomb and +3.0 × 10-6 coulomb, respectively,
on insulating stands separated by a distance of 0.10 meter.
68. Electrostatic force F exists between two point charges. If
the distance between the charges is tripled, the force
between the charges will be
(1) F
9
(2) F
3
(3) 3F
(4) 9F
69. The diagram below shows two negatively charged balloons
suspended from nonconducting strings being held by a
student.
What occurs as the student brings the balloons closer to
each other without allowing them to touch?
(1) The magnitude of the electrostatic force between the
balloons decreases, and they attract each other.
(2) The magnitude of the electrostatic force between the
balloons decreases, and they repel each other.
(3) The magnitude of the electrostatic force between the
balloons increases, and they attract each other.
(4) The magnitude of the electrostatic force between the
balloons increases, and they repel each other.
70. If the charge on each of two small charged metal spheres is
doubled and the distance between the spheres remains
fixed, the magnitude of the electric force between the
spheres will be
(1) the same
(3) one-half as great
(2) two times as great
(4) four times as great
The spheres are touched together and then returned to their
original positions. As a result, the magnitude of the
electrostatic force between the spheres changes from 2.7 N
to
(1) 1.4 N
(3) 3.6 N
(2) 1.8 N
(4) 14 N
Answer Key
[New Exam]
1.
2
31.
3
61.
1
2.
2
32.
3
62.
1
3.
3
33.
3
63.
4
4.
3
34.
4
64.
3
5.
4
35.
1
65.
4
6.
3
36.
3
66.
1
7.
3
37.
3
67.
3
8.
2
38.
3
68.
1
9.
3
39.
2
69.
4
70.
4
10.
4
40.
2
11.
2
41.
2
12.
4
42.
2
13.
4
43.
2
14.
1
44.
1
15.
3
45.
3
16.
3
46.
2
17.
4
47.
2
18.
4
48.
4
19.
4
49.
3
20.
3
50.
3
21.
1
51.
3
22.
4
52.
2
23.
3
53.
4
24.
2
54.
3
25.
3
55.
2
26.
3
56.
4
27.
2
57.
4
28.
3
58.
2
29.
1
59.
1
30.
1
60.
4