# Definition:Electromotive Force

## Definition

Electromotive force is a quantity that measures the source of potential energy in an electrical circuit.

It is defined as the amount of work per unit charge.

It can be denoted $\EE$.

### Dimension

The dimension of measurement of electromotive force is $M L^2 T^{-3} I^{-1}$.

This derives from its definition as:

$\dfrac {\text{Work} }{\text {Charge} }$

### Unit

The unit of measurement of electromotive force is the volt $\mathrm V$:

$1 \ \mathrm V = 1 \ \mathrm{J} \ \mathrm{C}^{-1}$

that is, $1$ joule per coulomb.

## Also known as

Electromotive force can be abbreviated EMF, emf or e.m.f, and so on.