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

  • question_answer
    Time periods of vibation of two bar magnets in sum and difference positions are 4 sec and 6 sec respectively. The ratio of their magnetic moments \[{{M}_{1}}/{{M}_{2}}\]is          

    A) 6 : 4 

    B) 30 : 16

    C) 2.6 : 1

    D) 1.5 : 1

    Correct Answer: C

    Solution :

    [c] \[\frac{{{M}_{1}}}{{{M}_{2}}}=\frac{T_{2}^{2}+T_{1}^{2}}{T_{2}^{2}-T_{1}^{2}}=\frac{{{6}^{2}}+{{4}^{2}}}{{{6}^{2}}-{{4}^{2}}}=\frac{52}{20}=(2.6):1\]


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