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A conducting disc of radius a and mass mis kept rotating with a constant angular...

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A conducting disc of radius a and mass mis kept rotating with a constant angular speed in a horizontal plane about a vertical axis in a uniform vertical magnetic field B as shown in figure One metal contact B is made at the circumference of the disc and another contact B is made in such a way that its distance from centre is always a 2 If the switch Sis closed at t 0 then the value of current in the inductor at t In2 is 3Boa nR Value of n is ER L S X B X B ki a 2

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