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KVPY Sample Paper KVPY Stream-SX Model Paper-2

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

    A) Zero

    B) \[B\text{ v }\pi {{R}^{2}}/2\] and M is at higher potential

    C) \[\pi \] R B v and Q is at higher potential

    D) 2 R B v and Q is at higher potential

    Correct Answer: D

    Solution :

    [D] \[e=Bv(2R)\] and Q is at high potential


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