A positive charge of one micro-coulomb is one meter away from a much larger positive charge and has one joule of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(A) 1J.
(B) 2J.
(C) 0.5J
A positive charge of one micro-coulomb is one meter away from a much larger positive charge and has one joule of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(A) 1J. --- No.
It will change.
A positive charge of one micro-coulomb is one meter away from a much larger positive charge and has one joule of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(B) 2J. --- Yes.
It will increase because work must be done to move it closer.
A positive charge of one micro-coulomb is one meter away from a much larger positive charge and has one joule of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(C) 0.5J --- No.
Work must be done to bring it closer.
A negative charge of one micro-coulomb is one meter away from a much larger positive charge and has two joules of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(A) 1J.
(B) 2J
(C) 3J
A negative charge of one micro-coulomb is one meter away from a much larger positive charge and has two joules of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(A) 1J. --- Yes. It decreases.
A negative charge of one micro-coulomb is one meter away from a much larger positive charge and has two joules of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(B) 2J --- No. Negative work is done.
A negative charge of one micro-coulomb is one meter away from a much larger positive charge and has two joules of potential energy. If the charge
moves to one half meter away from the positive charge, its potential energy could be
(C) 3J --- No. Negative work is done.
An inventor has a device which looks like a Van de Graf generator. A belt carries electric charge into a metal sphere and comes back out. Once the sphere is charged, the combs which take charge off the belt retract so that charge then rides both up and down the belt. An arrangement of metal shields modifies the electric field of the sphere so that it is stronger on the downward side of the belt. Thus, the belt turns by itself and generates energy forever.
(A) The device will work. Buy stock in it!
(B) The P.E. of each charge on the belt returns to the same value each time around, so no net work is done.
(C) The device must use up the unbalanced charge on the sphere and soon stops.
An inventor has a device which looks like a Van de Graf generator. A belt carries electric charge into a metal sphere and comes back out. Once the sphere is charged, the combs which take charge off the belt retract so that charge then rides both up and down the belt. An arrangement of metal shields modifies the electric field of the sphere so that it is stronger on the downward side of the belt. Thus, the belt turns by itself and generates energy forever.
(A) The device will work. Buy stock in it!
No. Waterfront property in Arizona might be better.
An inventor has a device which looks like a Van de Graf generator. A belt carries electric charge into a metal sphere and comes back out. Once the sphere is charged, the combs which take charge off the belt retract so that charge then rides both up and down the belt. An arrangement of metal shields modifies the electric field of the sphere so that it is stronger on the downward side of the belt. Thus, the belt turns by itself and generates energy forever.
(B) The P.E. of each charge on the belt returns to the same value each time around, so no net work is done.
Yes. Electric fields permit potential energy to be defined.
An inventor has a device which looks like a Van de Graf generator. A belt carries electric charge into a metal sphere and comes back out. Once the sphere is charged, the combs which take charge off the belt retract so that charge then rides both up and down the belt. An arrangement of metal shields modifies the electric field of the sphere so that it is stronger on the downward side of the belt. Thus, the belt turns by itself and generates energy forever.
(C) The device must use up the unbalanced charge on the sphere and soon stops.
No. With the combs retracted, there is no way to take charge off the sphere.
When one coulomb of charge passes through a battery, its electrical potential energy increases by 1.5J. If 4 coulombs of charge pass through the same battery, its electrical potential energy will increase by
(A) 1.5J.
(B) 3.0J.
(C) 6.0J.
(D) 0.375J
When one coulomb of charge passes through a battery, its electrical potential energy increases by 1.5J. If 4 coulombs of charge pass through the same battery, its electrical potential energy will increase by
(A) 1.5J. --- No. The amount will be different.
When one coulomb of charge passes through a battery, its electrical potential energy increases by 1.5J. If 4 coulombs of charge pass through the same battery, its electrical potential energy will increase by
(B) 3.0J. --- No. The charge increases by a factor of 4.
When one coulomb of charge passes through a battery, its electrical potential energy increases by 1.5J. If 4 coulombs of charge pass through the same battery, its electrical potential energy will increase by
(C) 6.0J. --- Yes. 4 times 1.5J.
When one coulomb of charge passes through a battery, its electrical potential energy increases by 1.5J. If 4 coulombs of charge pass through the same battery, its electrical potential energy will increase by
(D) 0.375J --- No. The charge increases, so the P.E. increases.
Electric Potential Energy
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