Electrostatics Review Question Preview (ID: 55100)


Electrostatic Review. TEACHERS: click here for quick copy question ID numbers.

Is it possible for two negative charges to attract each other?
a) Yes, they will attract if one carries a larger charge than the other.
b) No, they will never attract.
c) Yes, they always attract
d) Yes, they will attract if they are close enough

Two charged objects are separated by a distance d. The first charge is larger in magnitude than the second charge.
a) The second charge exerts a larger force on the first charge
b) The charges exert forces on each other equal in magnitude and pointing in the same direction
c) The first charge exerts a larger force on the second charge
d) The charges exert forces on each other equal in magnitude and opposite in direction.

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/3
b) 9F
c) 3F
d) F/9

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) neutral sphere, charged rod, negative
b) neutral sphere, charged rod, positive
c) charged rod, neutral sphere, negative
d) charged rod, neutral sphere, positive

An atom has more electrons than protons. The atom is
a) positive ion
b) negative ion
c) semiconductor
d) neutral

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 negative charge.
c) acquires a positive charge.
d) could either be positively charged or negatively charged. It depends on how hard the rod was rubbed.

Which charging method is a temporary charge?
a) conduction
b) friction
c) induction
d) positive

What is the conservation of charge?
a) the amount of charge can not be created nor destroyed
b) positive and negative charges must be equal on an object
c) positive and negative charges repel each other
d) like charges attract each other

What is the unit for electric charge?
a) Coulomb (C)
b) Newton (N)
c) Kilogram (kg)
d) Meter (m)

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) -2.2E11 C
b) 9E9 C
c) 1.4E11 C
d) -4.7E9 C

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 goes to zero
b) It doubles
c) It quadruples
d) It will not change

How does an object become charged?
a) protons exchanged
b) neutrons exchanged
c) nucleus gains a proton
d) electrons exchanged

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