Q3-SUMMATIVE TEST IN GEN PHYSICS 2
Quiz by Hazel Castro
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- Q1
Which of the following explains why a rubber rod becomes negatively charged when rubbed with a piece of fur?
Protons are removed from the rod.
The fur is left neutral.
Electrons are added to the fur.
Electrons are added to the rod.
60s - Q2
Two point charges, initially 20 cm apart, are moved to a distance of 100 cm apart. What is the factor in the change of the resulting electric force between them?
1/5
1/25
25
5
60s - Q3
What happens when two charges are moved closer together?
The total charge increases.
The electric field doubles.
Coulomb’s law takes effect.
The force between the charges increases.
60s - Q4
Two equal charges are separated by 3.7 × 10−10 m. The force between the charges has a magnitude of 2.37 × 10−3 N. What is the magnitude of q on the charges?
1.9 x 10 -19 C
3.8 x 10 -19 C
3.8 x 10 -19 C
7.6 x 10 -19 C
60s - Q5
Two point charges having charge of -2.0 μC and 4.0 μC are separated by 1.5 cm. What is the electric force between them?
-3.2 x 10 -2 N
-3.2 x 10 -10 N
-3.2 x 10 2 N
-3.2 x 10 10 N
60s - Q6
What is the direction of the electric field around an isolated negative charge?
Points outward
Points inward.
Forms clockwise circles about the charge.
Forms counterclockwise circles about the charge.
60s - Q7
A positively charged rod is brought close to one end of a metallic plate. What type of charge is induced on the left side of the plate?
Positive
It stays neutral
Negative
It depends on the contact time.
60s - Q8
A negatively charged sphere A is placed near sphere B. Sphere B is touched with a grounded wire. What is the charge on sphere B when the wire is removed?
Negative
Positive
It stays neutral
It depends on the contact time.
60s - Q9
Two electrostatic point charges of +20.0 μC and –30.0 μC exert attractive forces on each other of –125 N. What is the distance between the two charges?
2.08 x 10 -5 m
2.08 x 10 5 m
2.08 x 10 -1 m
2.08 x 10 1 m
60s - Q10
Which is the method of charging an object by rubbing it against another object?
Polarization
Conduction
Friction
Induction
60s - Q11
If electric flux means flow of electric field lines, when is electric flux outward?
No charge.
Negative charge in interior.
Both charges in interior.
Positive charge in interior.
60s - Q12
The total flux through the below spherical surface is
zero
negative
not well defined
positive
60s - Q13
Which has the smallest magnetic flux?
d
c
a and b
a
60s - Q14
The net flux through a 3D closed surface is 2.2 x 103 Nm2/C. How much charge must be inside the surface?
1.9 x 10 -8 C
1.9 x 108 C
1.9 x 1019 C
1.9 x 10-19 C
60s - Q15
In the figure below, a configuration of four closed surfaces and three charges of -2Q−, +Q, and -Q is shown. What is the electric flux through surface 3.
-Q
-2Q
2Q
Q
60s
