electromagnetic induction
- electromagnetic induction
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the induction of an electromotive force by the motion of a conductor across a magnetic field or by a change in magnetic flux in a magnetic field.
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The phenomenon was first investigated in 1830–31 by Joseph Henry and
Michael Faraday, who discovered that when the
magnetic field around an electromagnet was increased or decreased, an
electric current could be detected in a separate nearby
conductor. A current can also be induced by constantly moving a permanent magnet in and out of a coil of wire, or by constantly moving a conductor near a stationary permanent magnet. The induced electromotive force is proportional to the rate of change of the magnetic flux cutting across the circuit.
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Universalium.
2010.
Look at other dictionaries:
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