A vertical ring of radius r is made of a uniform wire of resistance R...

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A vertical ring of radius r is made of a uniform wire of resistance R It slips vertically between two frictionless and resistanceless vertical rails There is a uniform magnetic field B perpendicular to plane of ring and rails as shown in figure When the speed of ring is v then the current in section PQ at that NBvr 2R Value of N is instant is XXXX X X X X X X XXXX X X X X

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