J & K CET Medical J & K - CET Medical Solved Paper-2002

  • question_answer
    At Curie point, a ferromagnetic materic becomes :

    A)  non-magnetic                  

    B)  diamagnetic

    C)  paramagnetic                  

    D)  strongly ferromagnetic

    Correct Answer: C

    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.


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