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JCECE Engineering JCECE Engineering Solved Paper-2010

  • question_answer
    \[3\,\,A\] of current is flowing in a linear conductor having a length of\[40\,\,cm\]. The conductor is placed in a magnetic field of strength \[500\] gauss and makes an angle of \[{{30}^{o}}\] with direction of the field. It experiences a force of magnitude

    A) \[3\times {{10}^{4}}N\]

    B) \[3\times {{10}^{2}}N\]

    C) \[3\times {{10}^{-2}}N\]                              

    D)  \[3\times {{10}^{-4}}N\]

    Correct Answer: C

    Solution :

    Force,\[F=Bil\sin \theta \]                 \[=500\times {{10}^{-4}}\times 3\times (40\times {{10}^{-2}})\times \frac{1}{2}\]                 \[=3\times {{10}^{-2}}N\]


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