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NEET2008PhysicsMagnetic Properties of MatterActual

Curie temperatures is the temperature above which

Options

  1. Aferromagnetic material becomes paramagnetic material
  2. Bparamagnetic material becomes diamagnetic material
  3. Cparamagnetic materíal becomes ferromagnetic material
  4. Dferromagnetic material becomes diamagnetic material

Correct answer

A. ferromagnetic material becomes paramagnetic material

Step-by-step solution

Ferromagnetism decreases with rise in temperature. If we heat a ferromagnetic substance, then at a definite temperature the ferromagnetic property of the substance suddenly disappears and the substance becomes paramagnetic. The temperature above which a ferromagnetic substance becomes paramagnetic is called the Curie temperature of the substance. Note: The Curie temperature of iron is 770^ C and that of nickle in 358^ C .

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