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electron volt

 Definition/Summary A joule ($1\ J$) is a coulomb volt, and is the S.I. unit of energy. It is the the energy difference when you move something with one coulomb ($1\ C$) of charge through an electric potential difference of one volt ($1\ V$). An electron volt ($1\ eV$) is the energy difference when you move something with the charge of an electron through one volt.

 Equations Charge of an electron: $$1.60217653(14) × 10^{-19}\ C$$ and so: $$1\ eV\ =\ 1.60217653(14) \times 10^{-19}\text{ coulomb volts}$$ $$=\ 1.60217653(14) \times 10^{-19}\ J$$

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 Breakdown Physics > Electromagnetism >> Physical Quantities & Units