distinguish between permanent and electromagnet ?
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A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.
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PERMANENT MAGNETS
1 permanent magnet have magnetic field permanent (always)
2 permanent magnets are used in motor and speaker.
3 permanent magnets can lose their magnetic field if they heated
ELECTOMAGNET
1 Their magnetic field is controllable
2 they are used in cranes and linear accelerator
3 they do not lose their Electromagnetic field
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