Question

A charge of `4 C` is passing through points A and B on a circuit. If the charge's electric potential changes from `38 J` to `14 J`, what is the voltage between points A and B?

Answer 1

`6"V"`

Explanation:

The question is badly worded as electric potential is measured in volts, not Joules.

I will assume that the change in potential energy, i.e the work done in moving a charge of `4C` through a potential difference of `V` volts is `38-14=24"J"`

`:.4xxV=24`

`V=24/4=6V`

Unit check: `V=J/C`