Question

If it takes 50 J of energy to move 10 C of charge from point A to point B, what is the magnitude of the potential difference between points A and B?

Answer 1

By definition, potential difference $V$ between points A and B is work required to move a charge from point A to point B per unit charge.

$\displaystyle V = \frac{W}{q} = \frac{50}{10} = 5$ V (5 volt).

Answer: 5 V.