Explain how a magnet gets demagnetized when an alternating current is passed through a coil in which the magnet is placed.

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Solution

The process used for destroying a magnet's magnetism (the magnetic properties) is called demagnetization.
Alignment of the molecular magnet changes when an alternate current is passed through it.
Magnets gain energy, and their orderly alignment is disturbed when an alternating current is passed.
Hence, the magnet loses its magnetic properties.
In this way, a magnet gets demagnetized when an alternating current is passed through a coil in which the magnet is placed.

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