Question
Two identical small plastic balls are rubbed against a piece of wool such that both of them recevied approximately 2×10^{12}and 2.5×10^{12} electrons respectively.Now both the charged balls are kept at a dis†an ce of 25 cm in air. Calculate the nature and magnitude of the force between both the balls.If charges on the both balls are increased by 10 percent then calculate the change in electrosatic force between two balls.