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Two particles , each of mass m and carry...

Two particles , each of mass `m` and carrying charge `Q` , are separated by some distance. If they are in equilibrium under mutual gravitational and electrostatic force then `Q//m (in C//kg)` is of the order of

A

`10^(-5)`

B

`10^(-10)`

C

`10^(-15)`

D

`10^(-20)`

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The correct Answer is:
B
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