JEE Main & Advanced Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank Biot-savart's Law and Amperes Law

  • question_answer
    A current of 10A is passing through a long wire which has semicircular loop of the radius 20cm as shown in the figure. Magnetic field produced at the centre of the loop is    [Orissa JEE 2003]

    A)            \[10\,\pi \mu T\]

    B)            \[5\,\pi \mu T\]

    C)            \[4\,\pi \mu T\]                  

    D)            \[2\,\pi \mu T\]

    Correct Answer: B

    Solution :

               \[Q=\frac{1}{2}m{{(2v)}^{2}}\]


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