Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Alabama to Anderson, Dame Judith

Alternating current

hertz

Alternating current, electrical signal that reverses direction at regular intervals. The frequency of alternation is measured in cycles per second (hertz); U.S. household current is 60 hertz.

Alternation of generations [next] [back] Altamira

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