If the distance between two
protons is tripled, then the force they exert on each other, compared to the original force, will be one-ninth
as great one-third
as great three
times as great nine
times as great 2.
If the distance between two
point sources of equal charge is halved, the electrical force between the sources will be halved
doubled
quartered
quadrupled
3.
Two point charges that are
separated by a distance of 1.0 m repel each other with a force equal to 9.0 N. What is the force of
repulsion when these two charges are 3.0 m apart ? 1.0 N
27 N
3.0 N
81 N
4.
If the charge on one of two
positively charged spheres is doubled, the electrostatic force of repulsion between the spheres
will be halved
doubled
quartered
quadrupled
5.
If a negatively charged object
has an excess of 2.5 x 1019 electrons, its net charge is -1.6 C
-2.5 C
-6.5 C
-4.0 C
6.
An object carrying a charge of
-2 x 10-6 C is acted upon by an electric force of 0.06 N. The magnitude of the electric field
intensity at this point is 3 x 104
N/C 3 x 10-5
N/C 1 x 102
N/C 3 x 103
N/C 7.
A rod and a piece of cloth are
rubbed together. If the rod acquires a charge of +1 x 10-6 C, the cloth acquires a charge of 0 C
+1 x
10-6 C -1 x 10-6
C +1 x
106 C 8.
The electrostatic force of
attraction between two small spheres that are 1.0 m apart is F. If the distance between the spheres is
decreased to 0.5 m, the electrostatic force will then be F/2
2F
F/4
4F 9.
A sphere has a negative charge
of 6.4 x 10-7 C. Approximately how many electrons must be removed to make the sphere
neutral ? 1.6 x
10-8 9.8 x
105 6.4 x
1026 4.0 x 1012
10.
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
11.
A metal sphere with a charge of +11 elementary charges touches an identical sphere with
a charge of +15 elementary charges. After the spheres touch, the charge on the first sphere is
+13
+26
-4
+4
12.
A and B are two identical uncharged metal spheres. Sphere A is given an electrical charge
of +q, touched to sphere B, and then removed. The charge on sphere A after separation is
+q
-q
+q/2
-q/2