magnetic field

the space around a magnet or a current-carrying wire

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an insulated wire wrapped round an iron bar that becomes magnetic when there is a current in the wire

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induced magnetism

magnetism of an unmagnetised magnetic material by placing it in a magnetic field 

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magnetic field line

line in a magnetic field along which a magnetic compass points-also called a line of force

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motor effect

when a current is passed along a wire in a magnetic field ,and the wire is not parallel to the lines of the magnetic field, a force is excerted on the wire by magnetic field 

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a long coil of wire that produces a magnetic field in and around the coil when there is a current in the coil

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