Electromagnetic induction is a physical phenomenon in which a changing magnetic field within a closed loop induces an electromotive force (EMF) or voltage in that loop. This principle is fundamental to much of modern electrical engineering and forms the basis for many technologies, including generators, transformers, and inductors.
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Electromagnetic induction includes an induced electromotive force associated with a changing magnetic field or motion of a conductor in a magnetic field. Faraday's law of induction and motional electromotive force specify the relevant contributions.
