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Voltage

symb.: u

unit: V

Is a derived unit of electric potential difference in the International System of Units (SI).

One volt is defined as the difference in electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. It is also equal to the potential difference between two parallel, infinite planes spaced 1 meter apart that create an electric field of 1 newton per coulomb.