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The Electron Volt

The electron volt is a small unit of energy usually used for sub-atomic particles.1 electron volt is the amount of energy an electron gains by being accelerated through a potential difference of 1V.If an electron is accelerated through a potential difference of 1V its kinetic energy will be increased.Since
V = W
Q
this can be rearranged to W = Q V.The charge on an electron is e (1.6 × 10-19C).So W = eV, so 1 eV = 1.6 × 10-19J.

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Specification: Edexcel Physics (8PH0), AS-level, Topic 3: Electric Circuits. Topic: Electrical Quantities.

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