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  4. At Curie point, a ferromagnetic materic becomes :

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Q. At Curie point, a ferromagnetic materic becomes :

J & K CETJ & K CET 2002

Solution:

The Curie point or Curie temperature of a ferromagnetic material is the temperature above which it loses its characteristic ferromagnetic ability, the ability to possess a net magnetisation in the absence of an external magnetic field. As the temperature is increased from below the Curie point thermal fluctuations increasingly destroy this alignment, until the net magnetization becomes zero at and above the Curie point. Above the curie point, the material is purely paramagnetic.