JEE Main & Advanced Sample Paper JEE Main Sample Paper-26

  • question_answer
    At a temperature of \[{{30}^{o}}C\], the susceptibility of a ferromagnetic material is found to be \[\chi \] . Its susceptibility at \[{{333}^{o}}C\] is :

    A)  \[\chi \]                                    

    B)  \[0.5\chi \]

    C)  \[2\chi \]                                  

    D)  \[0.09\,\chi \]

    Correct Answer: D

    Solution :

    \[\chi \,\propto \,\frac{1}{T}\] \[\frac{{{\chi }_{2}}}{{{\chi }_{1}}}\,=\frac{{{T}_{1}}}{{{T}_{2}}}\] Given \[{{T}_{1}}={{30}^{0}}\,C,\,\,{{T}_{2}}={{333}^{0}}C,\,\,{{\chi }_{1}}=\chi \] \[{{\chi }_{2}}=\frac{{{T}_{1}}}{{{T}_{2}}}\,\chi =\,\frac{30}{333}\chi \,=0.09\,\chi \]

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