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NEET Sample Paper NEET Sample Test Paper-54

  • question_answer
    A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be-

    A) \[nB\]                           

    B) \[{{n}^{2}}B\]

    C) \[2nB\]             

    D) \[BI\ell \]

    Correct Answer: B

    Solution :

    \[B\,\,\propto \,\,{{n}^{2}}\]


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