b) Define electromagnet.
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Explanation:
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the centre of the coil.
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Explanation:
electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
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