electromagnet


elec·tro·mag·net

noun \i-ˌlek-trō-ˈmag-nət\

: a piece of metal that becomes magnetic when an electric current is passed through or near it

Full Definition of ELECTROMAGNET

:  a core of magnetic material (as iron) surrounded by a coil of wire through which an electric current is passed to magnetize the core

First Known Use of ELECTROMAGNET

1831

elec·tro·mag·net

noun \i-ˌlek-trō-ˈmag-nət\   (Medical Dictionary)

Medical Definition of ELECTROMAGNET

: a core of magnetic material surrounded by a coil of wire through which an electric current is passed to magnetize the core

electromagnet

noun    (Concise Encyclopedia)

Device consisting of a core of magnetic material such as iron, surrounded by a coil through which an electric current is passed to magnetize the core. When the current is stopped, the core is no longer magnetized. Electromagnets are particularly useful wherever controllable magnets are required, as in devices in which the magnetic field is to be varied, reversed, or switched on and off. Suitably designed magnets can lift many times their own weight and are used in steelworks and scrap yards to lift loads of metal. Other devices that utilize electromagnets include particle accelerators, telephone receivers, loudspeakers, and televisions.

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