In which device the phenomenon of electrromagnetic induction from the underlying principles???
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The EMF generated by Faraday's law of induction due to relative movement of a circuit and a magnetic field is the phenomenon underlying electrical generators. When a permanent magnet is moved relative to a conductor, or vice versa, an electromotive force is created.
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"Electromagnetic induction" is the principle in various devices such as DC motors, door bells and transformers.
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