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Ampere (amp or A), unit for measuring the rate of flow of an electric current. One ampere is defined as the current in each of 2 parallel wires when the magnetic force between them is 2 × 10−7 newtons per meter. It is named after André Marie Ampère, the French scientist.

See also: Ammeter; Ohm's law.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Alabama to Anderson, Dame Judith