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JEE Main & Advanced Physics Magnetism Question Bank Self Evaluation Test - Magnetism and Matter

  • question_answer
    At a temperatur of \[30{}^\circ C\], the susceptibility of a ferromagnetic material is found to be X. Its susceptibility at \[333{}^\circ C\] is

    A) \[\chi \] 

    B) \[0.5\chi \]

    C) \[2\chi \]  

    D) \[11.1\chi \]

    Correct Answer: B

    Solution :

    [b] \[\frac{{{\chi }_{{{m}_{1}}}}}{{{\chi }_{{{m}_{2}}}}}=\frac{{{T}_{2}}}{{{T}_{1}}}=\frac{273+333}{273+30}=\frac{606}{303}=2\] \[\therefore \,\,\,\,{{\chi }_{{{m}_{2}}}}={{\chi }_{{{m}_{1}}}}/2=0.5{{\chi }_{{{m}_{1}}}}=0.5\chi .(\because \,{{\chi }_{{{m}_{1}}}}=\chi )\]


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