Question

A charge of `4 C` is passing through points A and B on a circuit. If the charge's electric potential changes from `27 J` to `18 J`, what is the voltage between points A and B?

Answer 1

`9/4V`

Explanation:

Voltage is just another name for electrical potential difference - that is, the change in electric potential between two points per coulomb.

`1V = 1 J/C`

If the `4C` charge's electric potential drops from `27J` to `18J` then the voltage is
`V = (27-18)/4 = 9/4 V`