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Electrostatics Review
Test Description: Electrostatic Review
Instructions: Answer all questions to get your test result.
1) Is it possible for two negative charges to attract each other?
A
No, they will never attract.
B
Yes, they will attract if they are close enough
C
Yes, they will attract if one carries a larger charge than the other.
D
Yes, they always attract
2) Two charged objects are separated by a distance d. The first charge is larger in magnitude than the second charge.
A
The charges exert forces on each other equal in magnitude and pointing in the same direction
B
The second charge exerts a larger force on the first charge
C
The charges exert forces on each other equal in magnitude and opposite in direction.
D
The first charge exerts a larger force on the second charge
3) Two charges are separated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces?
A
F/9
B
F/3
C
9F
D
3F
4) A neutral metal sphere is touched by a negatively charged metal rod. During the process, electrons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.
A
charged rod, neutral sphere, negative
B
neutral sphere, charged rod, negative
C
charged rod, neutral sphere, positive
D
neutral sphere, charged rod, positive
5) An atom has more electrons than protons. The atom is
A
semiconductor
B
neutral
C
negative ion
D
positive ion
6) A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive charge and the silk
A
remains neutral.
B
acquires a positive charge.
C
could either be positively charged or negatively charged. It depends on how hard the rod was rubbed.
D
acquires a negative charge.
7) Which charging method is a temporary charge?
A
induction
B
conduction
C
friction
D
positive
8) What is the conservation of charge?
A
positive and negative charges must be equal on an object
B
positive and negative charges repel each other
C
like charges attract each other
D
the amount of charge can not be created nor destroyed
9) What is the unit for electric charge?
A
Coulomb (C)
B
Meter (m)
C
Kilogram (kg)
D
Newton (N)
10) Calculate the force exerted between two charged objects separated by a distance of 0.7 m. One object has a charge of -4 C and the other has a charge of +3 C
A
9E9 C
B
-4.7E9 C
C
-2.2E11 C
D
1.4E11 C
11) An electron and a proton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electron?
A
It will not change
B
It doubles
C
It goes to zero
D
It quadruples
12) How does an object become charged?
A
nucleus gains a proton
B
protons exchanged
C
neutrons exchanged
D
electrons exchanged
*select an answer for all questions
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