Two identical conducting rings \(A\) and \(B\) of radius \(r\) are in pure rolling over a horizo....

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Two identical conducting rings \(A\) and \(B\) of radius \(r\) are in pure rolling over a horizontal conducting plane with same speed (of center of mass) \(v\) but in opposite direction. A constant magnetic field \(B\) is present pointing inside the plane of paper. Then the potential difference between the highest points of the two rings, is 
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