Question

demagnetization occurs when the magnet is heated or dropped, why.
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Answer 1

When the temperature decreases, the magnetic moment increases and the magnet becomes warm. The spontaneous magnetic moment decreases when it reaches in the Curie temperature and goes it to zero. This magnetic moment of ferromagnetic substance will also affected by many factors such as external magnetic field.

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Answer 2

Answer:

Demagnetization occurs when the magnet is heated or dropped because when this occurs the particles within the magnet are moving at an increasingly faster and sporadic rate.