Definition:Electromotive Force

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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.