# Definition:Electromotive Force

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## Contents

## 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 $\mathcal E$.

### 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.