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

Option: 1

zero


Option: 2

\mathrm{\frac{\mathrm{BV} \pi \mathrm{R}^2}{2} ~and~ \mathrm{M}}  is at higher potential


Option: 3

\mathrm{ \pi RBV} and Q is at higher potential


Option: 4

2 RBV and Q is at higher potential


Answers (1)

best_answer

Effective length = 2R

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