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For other uses, see Volt (disambiguation). The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.
In 1881 the electrical unit we know today, the volt, was named in Voltaâs honor. From the first battery, mentioned above, we can derive a definition of voltage as: Volts-or V-are an electrical measure of energy potential. Voltage can also be thought of as the amount of pressure of electrons that pass from a negative connector to a positive connector.