Question

6. Two particles having charges Q, and ly, when kept at
a certain distance exert a force F on each other. If the
distance between the two particles is reduced to half and
the charge on each particle is doubled, the force between
the particles would be
(1) 2F
(2) 4F
(3) 8 F
(4) 16 F​

Answer 1

the answer is 8F.

because the Q and ly charges are keeping certain distance with force. if the distance is reduce the charging is doubled.