A ring of mass m and radius r is made of an insulting material carries uniformly distributed charge Initially it rests on a

Question

A ring of mass m and radius r is made of an insulting material carries uniformly distributed charge Initially it rests on a frictionless horizontal tabletop with its plane vertical The charge on the ring such that it starts rolling on entering completely into the region of the magnetic field is mo then find the value of N rB m r

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