Question

When two particles having charges q, and q, are
kept at a certain distance, they exert a force Fon
each other. If the distance between the two particles
is reduced to half and the charge on each particle
is doubled then the force between the particles
would be
(1) 25
(2) 4F
(3) 8F
(4) 16F
​

Answer 1

hope it helps.................