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Volt Unit of electrical potential, potential difference and electromotive force in the metreÐkilogramÐsecond system (SI); it is equal to the difference in potential between two points in a conductor carrying one ampere current when the power dissipated between the points is one watt. An equivalent is the potential difference across a resistance of one ohm when one ampere is flowing through it. The volt is named in honour of the 18thÐ19th-century Italian physicist Alessandro Volta. See the Encyclopædia Britannica entry here. |
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