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Ampère's law
(redirected from Ampère's circuital law)

    Also found in: Wikipedia 0.03 sec.

Ampère's law

Law of electromagnetism that describes mathematically the magnetic force between two electric currents. It was named after A.-M. Ampère, who discovered that such forces exist. If two currents flow in the same direction, the force between the two wires is attractive; if they flow in opposite directions, the force is repulsive. In each case, the force is directly proportional to the currents.
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