alternating current

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Noun[edit]

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alternating current (plural alternating currents) (abbreviated as AC)

  1. an electric current in which the direction of flow of the electrons reverses periodically having an average of zero, with positive and negative values (with a frequency of 50 Hz in Europe, 60 Hz in the US, 400 Hz for airport lighting, and some others); especially such a current produced by a rotating generator or alternator.

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