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A ring of radius R carries a charge q un...

A ring of radius R carries a charge q uniformly distribited over it. A long thin wire carrying charge `lambda`per unit length of it is held along its axis with one end coinciding with the centre of the ring. Find the interaction force between the ring and the thread.

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The correct Answer is:
`F=(dlambda)/(4piepsilon_(0)R)`
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NN GHOSH-ELECTRIC FIELD AND POTENIAL-EXERCISE-B
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