Alternating Current

An electric current whose direction changes direction with a frequency independent of circuit components. The number of times the current changes direction in one second is called the frequency.

The AC voltage is normally given as the RMS value.

Usually 50 or 60 cycles per second (Hertz). British domestic electricity is alternating current at 50Hz, where as American domestic electricicty is at 60Hz.

See also: AC Brownout, AC Line, AC Line Filter, Alternator, Apparent Power, Current, Direct Current, Electric Current, Negative Alternation, Polyphase AC, Three Phase Electricity.

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Subjects: Electronics Physics