Two particles, each of mass \( m \) and carrying charge \( Q \), are separated by some distance....

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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 forces then \( \mathrm{Q} / \mathrm{m} \) (in \( \mathrm{C} / \mathrm{kg} \) ) is of the order of
(A) \( 10^{-5} \)
(B) \( 10^{-10} \)
(C) \( 10^{-15} \)
(D) \( 10^{-20} \)
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