Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to a distance equal to half their initial separation. The force of repulsion between them increases 4.5 times in comparison with the initial value. The ratio of the initial charges of the balls is/??
let initial charges on them are and
force is repulsive means and are of same sign.
let initial separation be r.
after touching each other charge on both divides equally means both have the charge
final separation is half of the initial means r/2.
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