CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2001

  • question_answer
    An electron moving in a circular orbit of radius \[r\]makes \[n\]rotation per second. The magnetic field produced at the centre has a magnitude of:

    A) \[\frac{{{\mu }_{0}}ne}{2r}\]                     

    B) \[\frac{{{\mu }_{0}}{{n}^{2}}e}{2r}\]

    C)  \[\frac{{{\mu }_{0}}ne}{2\pi r}\]                              

    D)  zero

    Correct Answer: C

    Solution :

    Radius of circular path \[=r\]   (given)rotation of the electron per second\[~=n\] From the formula the magnetic field produced by the electron at the centre is given by                                 \[=\frac{{{\mu }_{0}}ne}{r}\]


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