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NEET Sample Paper NEET Sample Test Paper-20

  • question_answer
    A thin semi-circular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction\[\vec{B}.\]At the position MNQ, the speed of the ring is \[\upsilon .\]The potential difference developed across the ring is

    A)  0

    B)  \[\frac{1}{2}B\upsilon \pi {{R}^{2}},\] and M is at a higher potential

    C) \[\pi RB\upsilon ,\]and Q is at a higher potential

    D) \[2RB\upsilon ,\] and Q is at a higher potential

    Correct Answer: D

    Solution :

    The emf induced in a conductor does not depend on its shape but only on its end points. As a simple application of this principle, replace the actual conductor by an imaginary straight conductor joining its two ends. Hence, the correction option is (d).


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