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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.
The greater the voltage, the greater the flow of electrical current (that is, the quantity of charge carriers that pass a fixed point per unit of time) through a conducting or semiconducting medium for a given resistance to the flow.Voltage is symbolized by an uppercase italic letter V or E.The standard unit is the volt, symbolized by a non-italic uppercase letter V. One volt will drive one coulomb (6.24 x 10 18) charge carriers, such as electrons, through a resistance of one ohm in one second.Voltage can be direct or alternating.oltage is symbolized by an uppercase italic letter V or E. The standard unit is the volt, symbolized by a non-italic uppercase letter V. One volt will drive one coulomb (6.24 x 10 18) charge carriers, such as electrons, through a resistance of one ohm in one second. Voltage can be direct or alternating.