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JEE Main & Advanced JEE Main Paper (Held On 19 April 2014)

  • question_answer
    Figure shows a circular area of radius R where a uniform magnetic field \[\vec{B}\]is going into the plane of paper and increasing in magnitude at a constant rate. In that case, which of the following graphs, drawn schematically, correctly shows the variation of the induced electric fieldE(r)?     JEE Main Online Paper (Held On 19 April 2016)

    A)

    B)

    C)

    D)

    Correct Answer: A

    Solution :

    Inside the sphere field varies linearly i.e., \[E\propto r\] with distance and outside varies according to \[E\propto \frac{1}{{{r}^{2}}}\] Hence the variation is shown by curve (a)


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