Electromotive Force

Electromotive force, abbreviated as EMF, describe the energy provided by a source of electrical power, such as a battery or a generator.  It is not actually a "force" in the mechanical sense but rather a measure of the potential difference (voltage) generated by a power source when no current flows through the circuit.

 

Electromotive Force Formula
\( EMF \;=\;  W\;/\;  Q  \)
Symbol	English	Metric
\( EMF \) = Electromotive Force	\(V\)	-
\( W \) = Work Done	\(J\)	-
\( Q \) = Charge	\(C\)	-