points on electromagnet
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An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. ... An electromagnet works because an electric current produces a magnetic field.
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an electomegnet is a type of magnet in which the magnetic field is produced by an electric current.
electomegnet is usually consist of wire wound into a coil. a current through the wire create a magnetic field which is concentrated in the hole denoting the centre of the coil
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