Unité SI de symbole ( V) qui mesure la différence de potentiel entre deux points d'un conducteur transportant un courant d'un ampère lorsque la puissance dissipée entre ces deux points est égale ŕ un watt.
SI unit (symbol V) of electromotive force or electric potential. A small battery usually has a potential of one or two volts; the domestic electricity supply in the US is 110 volts. A high-tension transmission line may carry up to 765,000 volts.
The absolute volt is defined as the potential difference necessary to produce a current of one ampere through an electric circuit with a resistance of one ohm. It can also be defined as the potential difference that requires one joule of work to move a positive charge of one coulomb from the lower to the higher potential. It is named for the Italian scientist Alessandro Volta.
1. A unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt.
2. Equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it.
The (electrical) potential difference between two points in a circuit. The fundamental unit is derived as work per unit charge-(V = W/Q). One volt is the potential difference required to move one coulomb of charge between two points in a circuit while using one joule of energy.
The unit used to measure potential difference or electromotive force. One volt is defined as the potential across which 1 coulomb of charge will do 1 joule of work, or the potential generated by 1 ampere of current flowing through 1 ohm of resistance. See also electromotive force.