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A circular ri...

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A circular ring carries a charge Q . The position (x) of another charge q on the axis of circular ring so that it experiences a maximum force is (R is radius of ring) ?

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Q. A positive charge Q is distributed uniformly over a circular ring of radius R. A particle of mass m, and a negative charge q, is placed on its axis at a distance x from the centre. Find the force on the particle. Assuming x << R, find the time period of oscillation of the particle if it is released from there.

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