Two charged particles repel each other will a force F. If the charge on one particle is doubled and the distance between them is doubled, the force will be
A)F.
B)2 F.
C)F/2.
D)F/4.
E)none of the above

Question

Quizplus · Accepted Answer

The force between two charges is given by Coulomb's law: $ F = k \frac{q_1 q_2}{r^2} $. If one charge is doubled, the force becomes $ 2F $. If the distance is also doubled, the force becomes $ \frac{2F}{4} = \frac{F}{2} $.

Two Charged Particles Repel Each Other Will a Force F