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[" A metal rod of resistance "R" is fixe...

[" 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 an angular velocity "],[" about its axis.The centre of the ring is joining to its rim by an extemal wire "W" .The ring and "W" have no "],[" resistance.The current in "W" is: "]

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