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WorksheetsUnit 07 Electrostatics Review
Total questions: 15
Worksheet time: 20mins
Name
Class
Date
1.
What do you call the process of charging a conductor by bringing it near another charged object?
a)
induction
b)
polarization
c)
neutralization
d)
conduction
2.
Which of the following is not a good insulator?
a)
Copper
b)
Glass
c)
rubber
d)
wool
3.
Consider the conduction charging shown.
a)
Electrons move from the insulating stand into the sphere.
b)
Protons move from the bar into the sphere.
c)
Electrons move from the charged metal bar into the sphere.
d)
Protons move from the sphere into the negatively charged bar.
4.
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?
a)
A is positive and B is positive.
b)
A is negative and B is positive.
c)
A is positive and B is negative.
d)
A is negative and B is negative.
5.
Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be
a)
F
b)
4F
c)
2F
d)
F/4
6.
A negatively charged rod touches the knob of a neutral electroscope. Which best represents the distribution of charge on the electroscope.
a)
both the knob and leaves become positive
b)
both the knob and leaves become negative
c)
the knob becomes negative and the leaves become positive
d)
the knob becomes positive and the leaves become negative
7.
What is the end result of charging by friction?
a)
Both object have the same charge, so they will attract one another
b)
Both object have the same charge, so they will repel one another
c)
Both object have the opposite charge, so they will attract one another
d)
Both object have the opposite charge, so they will repel one another
8.
Coulomb's law says that the force between any two charges depends
a)
directly on the size of the charges
b)
inversely on the square of the distance between the charges
c)
both are correct
9.
The SI unit of charge is
a)
the ampere
b)
the newton
c)
the coulomb
d)
the joule
10.
Which picture correctly shows how the atoms in an insulator polarize when a positively-charged plate is brought nearby?
a)
b)
c)
d)
11.
When these opposite charges get closer, what happens to their electrical potential energy?
a)
increases
b)
decreases
c)
stays the same
12.
If you were to push these positive same charged particles together, do they have more or less electrical potential energy?
a)
more
b)
less
c)
the same as far apart
13.
When a plastic rod is rubbed with wool, why does the wool acquire a positive charge?
a)
Protons are transferred from the rod to the wool.
b)
Protons are transferred from the wool to the rod.
c)
Electrons are transferred from the rod to the wool.
d)
Electrons are transferred from the wool to the rod.
14.
Sphere A carries a charge of +8 coulombs, and Sphere B carries a charge of -6 coulombs. If the two are touched together and then separated, what will the charge on sphere A be?
a)
+1
b)
-1
c)
+2
d)
-2
15.
If a negative rod is brought near a neutral electroscope, how will the electrons on the electroscope move?
a)
Toward the rod
b)
Away from the rod
c)
Onto the rod
d)
Away from the leaves
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