Two spherical conductors B and C having equal radii and cayying equal charges on them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that B but uncharged is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is

Options

A. `(F)/(4)`
B. `(3F)/(4)`
C. `(F)/(8)`
D. `(3F)/(8)`

Answer

D

Explanation

`because =f prop q_(1)q_(2)`
`rArr f_(2) = (3f)/(8)`