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Q.

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B (figure). At the position MNQ the speed of the ring is V. The potential difference developed across the ring is :

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a

Zero

b

BVπR2 /V and M is at higher potential

c

πRBV and Q is at higher potential

d

2RBV and Q is at higher potential

answer is D.

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