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  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-2004

  • question_answer
    The magnetic field \[\vec{B}\] in a circular coil does not depend on:

    A)  current                               

    B)  radius

    C)  number of turns             

    D)  area

    Correct Answer: D

    Solution :

    The magnetic field at the centre of circular coil \[B=\frac{{{\mu }_{0}}nl}{2r}\] where r = radius of coil            \[I=\] current flowing in the coil            n = number of turns in a coil Therefore, magnetic field in a circular coil does not depend on area of coil.


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