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A charge of #4 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #37 J# to #7 J#, what is the voltage between points A and B?

Answer 1

Nora Arzate

#- 15/2 V#

The potential energy #U# is related to potential or voltage #V# by

#U = V q#

So #Delta V = (Delta U)/q = -30/4 = - 15/2 V#

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Answer 2

William Audy

The voltage between points A and B is 30 volts.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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