Physics – 4.2.3 Electromotive force and potential difference | e-Consult
4.2.3 Electromotive force and potential difference (1 questions)
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Electromotive force (e.m.f.) is the energy supplied by a source (like a battery or generator) to each unit charge of electric current flowing through it. It's essentially the 'push' that drives the electric current. The unit in which e.m.f. is measured is the volt (V).