NEET Sample Paper NEET Sample Test Paper-9

  • question_answer
    A current i is flowing in a conductor as shown in the figure. The magnetic induction at point O will be:

    A)  zero               

    B)  \[l{{\mu }_{0}}i/r\]

    C)  \[{{\mu }_{0}}i/4r\]                         

    D)  \[{{\mu }_{0}}i/r\]

    Correct Answer: C

    Solution :

    The magnetic induction, \[{{B}_{o}}\] (due to only half circle) \[=\frac{1}{2}\,\,\frac{{{\mu }_{0}}i}{2r}=\frac{{{\mu }_{0}}i}{4r}\] [as induction (Net), due to straight part will be conceled by each other]

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