The diagram below shows
some of the lines of electrical force around a positive point charge.
1. The diagram below shows
some of the lines of electrical force around a positive point charge.
The strength of the electric
field is
greatest at point A greatest at point B greatest at point C equal at points A, B, and C
2. Two charged spheres are
shown in the diagram below. Which polarities will produce the electric field shown ?
A and
B both negative A and B both positive A positive and B negative A
negative and B positive
3. As shown in the diagram
below, a charged rod is held near, but not touching, a neutral electroscope.
The charge on the knob is
+ and leaves + + and leaves - - and leaves + - and the leaves -
4. The diagram
below represents two small identical charged spheres located 2.00 meters apart.
The force between
these spheres is
1.80 x 10-2 N 3.60 x 10-2 N 4.50 x 10-2 N 9.00 x 10-2 N
5. How many
electrons are contained in a charge of 8.0 x 10-19 C ?
5 2 8 4
6. After a neutral object loses 2
electrons, it will have a net charge of
-2
elementary charges +2
elementary charges -3.2 x
10-19 elementary charges
+3.2 x
10-19 elementary charges
7. What is the amount of energy
gained by a proton accelerated through a potential difference of 50 V ?
1 eV
10 eV
50 eV
100 eV
8. How much work is done in
moving 6 electrons through a potential difference of 2.0 V ?
6.0 eV
2.0 eV
3.0 eV
12 eV
9. The Millikan oil drop
experiment showed the existence of
an
elementary charge a
photon an
atomic nucleus an
atom
10. A charge of 100. elementary
charges is equivalent to
1.60 x
10-21 C 1.60 x
10-17 C 6.25 x
10-16 C 6.25 x
1020 C
11. If 6.0 J of work is done to
move 2.0 C of charge between two points, what is the potential difference
between these two points ?
6.0 V
0.33 V
3.0 V
12 V
12. 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 ?
positive
negative
unknown
no
charge
13. Which electric charge is
possible ?
8.0 x
10-20 C 2.4 x
10-19 C 3.2 x 10-19
C 6.32 x
10-18 C
14. As the distance between two
point charges is tripled, the electostatic force between the charges will become
1/9 as
great 1/3 as
great 3
times as great 9
times as great
15. When an object is brought
near the knob of a positively charged electroscope, the leaves initially diverge.
The charge on the object
must
be zero must be
positive must
be negative cannot
be determined
16. The electronvolt is a unit of
charge
energy
potential
difference current
17. After two neutral solids, A
and B, were rubbed together, solid A acquired a net negative charge.
Solid B, therefore, experienced a
net
loss
of protons increase
of protons loss of
electrons increase
of electrons
18. If it takes 12 J of energy to
move 2.0 C of charge through a lamp filament, the potential difference across
the filament is
6.0 V
10 V
14 V
24 V
19. If the charge on each of two
positively charged objects is halved, the electrostatic force between the
objects will
decreased
to 1/2 decrease
to 1/4 decrease
to 1/16 remain
the same
20. An object with +10 elementary
charges is grounded and becomes neutral. What is the best explanation
for this occurrence ?
The
object gained 10 electrons from the ground The object lost 10 electrons to the ground
The object gained 10 protons from the ground The
object lost 10 protons to the ground
21. The diagram below shows two
identical metal spheres. Sphere A has a charge of +12 C. Sphere B is neutral.
When spheres A and B are in
contact, the total charge of the system is
neutral
+6 C +12
C +24 C
22. Two identical metal spheres
with charges of -2 elementary charges and +6 elementary charges come in
contact and then are separated.
What is the charge left on both spheres ?
-2
elementary charges +2
elementary charges -4
elementary charges +4
elementary charges
23. What is the energy gained
by an electron through a potential difference of 100 V ?
100 eV
100 J
100 C
100 V
24. If a negative rod is
brought near the knob of an uncharged electroscope, the leaves will become
positive
and diverge negative
and diverge positive
and fall negative
and fall
25. An electron is between two
oppositely charges parallel metal plates. As the electron moves from the
negative plate to the positive
plate, the electron's potential energy
decreases
increases
remains
the same
26. What is the magnitude of
the electric force acting on an electron located in an electric field with an
intensity of 5.0 x 103
N/C ?
3.2 x
10-23 N 8.0 x 10-16
N 5.0 x
103 N 3.2 x
1022 N
27. Most metals are good
electrical conductors because
their
molecules are close together they
have high melting points
they
have many intermolecular spaces they have a large number of free electrons
28. An alpha particle with a
charge of +2 elementary charges is accelerated in a vacuum through a
potential difference of 10,000 V.
What is the energy acquired by the particle ?
3.2 x
10-15 eV 2.0 eV
20,000
eV 40,000
eV
29. A charged particle is
placed in an electric field E. If the charge on the particle is doubled, the
force exerted on the particle by
the field E is
unchanged
doubled
halved
quadrupled
30. An elementary charge is
accelerated by a potential difference of 9.0 V. The total energy acquired
by the charge is
9.0 eV
12 eV
3.0 eV
27 eV
31. What happens to the
electric field intensity between two oppositely charged parallel plates as you
move from the positive to the
negative plate ?
it
decreases it
increases remains
the same
32. Identical spheres A and B,
charged as shown in the diagram below, are brought in contact and then separated.
What is the charge that remains
on sphere A ?
0 C
+0.02 C
-0.02
C -0.04 C
33. In the diagram below a
neutral pith ball is suspended on a string. A positively charged rod approaches the ball.
The ball will first move toward
A B C D
34. Two large metal plates are
charged to a potential difference of 100 V.
How much work is needed to move 1
C of negative charge from point A to point B ?
1 J 100
J 1 eV
100 eV
35. Four electric charges, A,
B, C, D are arranged as shown.
The electric force will be least
between charges
A and B A and C A and D B
and D