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NEET2006PhysicsMagnetic Properties of MatterActual

Above curie temperature:

Options

  1. Aa paramagnetic substance becomes ferromagnetic
  2. Ba ferromagnetic substance becomes paramagnetic
  3. Ca paramagnetic substance becomes diamagnetic
  4. Da diamagnetic substance becomes paramagnetic

Correct answer

B. a ferromagnetic substance becomes paramagnetic

Step-by-step solution

Curie temperature ( ( T _ C ) ) is the temperature at which certain materials lose their permanent magnetic properties, to be replaced by induced magnetism. Above the Curie temperature, the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition. The ordered magnetic moments change and become disordered at the Curie temperature. Higher temperatures make magnets weaker, as spontaneous magnetism only occurs below the Curie temperature.

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