# A charge of 8 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?

Feb 23, 2017

3V

#### Explanation:

Voltage is a measure of electrical potential energy per unit charge: $V = \frac{U}{Q}$.

In this case:

$\Delta V = \frac{\Delta U}{Q} = \frac{14 - 38}{8} = - 3 V$

The Voltage, or potential difference, between A and B is 3V.