Asked by Alex

Two charges q1 and q2 when separated by a distance r1 = R produce a force F1on each other. If the separation is increased to r2 = 2R, what is the new force F2 in terms of F1?
Answered by drwls
The Coulomb force between charges is inversely proportional to the square of distance between them.

If the distance doubles, the force gets multiplied by (1/2)^2 = 1/4
Answered by Michael Scott
Who knows