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Question

Two small equally charged spheres, each of mass mm, are suspended from the same point by silk threads of length l. The distance between the spheres x << l. Find the rate dqdt with which the charge leaks off each sphere if their approach velocity varies as v=a√x, where a is a constant (k=14πε0).

A
3a2mg2kl
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B
a2mg2kl
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C
mga22kl
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D
3mga2kl
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Solution

The correct option is A 3a2mg2kl

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