Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 23

electromagnetic induction

conductor emf magnetic field

The production of electromotive force (emf) - loosely, a voltage - in a conductor, either by moving the conductor in a magnetic field or by changing the field around the conductor. The emf induced in a circuit equals the rate of change of magnetic flux through it, multiplied by ?1 (Faraday's law, 1831). Induction is crucial to the operation of transformers, generators, and motors.

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