Definition for word: Volt

V. A measure of electrical potential that equals the voltage across a conductor when a single ampere of current flows through a resistance of one ohm. 

Referrence from

The volt (symbol: V) is the SI derived unit of electromotive force, commonly called "voltage". It is also the unit for the related but slightly different quantity electric potential difference (also called "electrostatic potential difference"). It is named in honor of the Italian physicist Alessandro Volta (1745–1827), who invented the voltaic pile, possibly the first chemical battery.

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