Question

Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.

Answer 1

Potential is defined as work done per unit charge.

$\therefore$ $V=\frac{W}{q}=\frac{J}{C}$ = volt

So, unit joule/coulomb is also known as volt.

Hence, option (b) is correct.