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When a ferromagnetic substance is heated above its Curie temperature, then :

Options

  1. Ait is demagnetised
  2. Bit becomes diamagnetic
  3. Cit becomes paramagnetic
  4. Dit remains unaffected.

Correct answer

C. it becomes paramagnetic

Step-by-step solution

If a ferromagnetic substance is heated above its Curie temperature. It looses some (not all) the magnetism properties materials and becomes paramagnetic. Curie temperature of Iron is 770 o c. i.e if iron is heated above 770 o c then it behave like paramagnetic substance.

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