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A script capital E, and not a force at all.
Also known as: EMF, Electromotive force, Source voltage, Script E
Electromotive force is measured in volts and is an energy per unit charge, not a force — the name is a nineteenth-century survival that every textbook apologises for. It is what a battery or a generator supplies before any internal resistance takes its share.
Denotes electromotive force: the energy supplied per unit charge by a source, measured in volts.
Contexts: Laboratory
Is not a force despite its name, and is not measured in newtons; the term predates the modern distinction between force and energy.
Contexts: Laboratory
Differs from the terminal voltage of a real source by the drop across its internal resistance.
Contexts: Laboratory
A capital letter E in script form, a curved vertical stroke with three horizontal arms.