The ratio of electric force to the gravitational force between two protons separated by a finite distance is of the order of:
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 Q/m (in C/Kg) is of the order of:
Two charges 2C and 6C are separated by a finite distance. If a charge of −4C is added to each of them, The initial force of 12×103N will change to :
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