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A metal rod of resistance R is fixed along a diameter of a conducting ring...

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A metal rod of resistance R is fixed along a diameter of a conducting ring of radius r There is a magnetic field of magnitude B perpendicular to the plane of the loop The ring spins with angular speed about its axis The centre of the ring is joined to its rim by an external wire W The wire W have no resistance The current in Wis 1 Zero 2 Br w 2 4 Br w 2R 2Br w

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