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Energy per electric charge

Applicable units are those of quantitykind:EnergyPerElectricCharge

Voltage is a representation of the electric potential energy per unit charge. If a unit of electrical charge were placed in a location, the voltage indicates the potential energy of it at that point. In other words, it is a measurement of the energy contained within an electric field, or an electric circuit, at a given point. Voltage is a scalar quantity. The SI unit of voltage is the volt, such that $1 volt = 1 joule/coulomb$.

http://physics.about.com/od/glossary/g/voltage.htm

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