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Two identical thin rings, each of radius R metres, are coaxially placed at a distance of R metres from each other. If coulombs and coulombs are the charges uniformly spread on the two rings, the work done in moving a charge q from the centre of first ring to that of the second is
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Correct option is B
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A ring of radius I caries a charge +q. A test charge -qo is released on its axis at a distance from its centre. How much kinetic energy will be acquired by the test charge when it reaches the centre of the ring ?
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