Two conducting spheres of radii R each are given equal charges +Q and are kept such that their centre are at distance r `(geR)`. The force of attraction (F) between them is:

Options

A. `(KQ^(2))/r^(2)`
B. `(KQ^(2))/(r+2R)^(2)`
C. `(KQ^(2))/r^(2)ge Fge (KQ^(2))/(r-2R)^(2)ge Fge(KQ)/r^(2)`
D. `(KQ^(2))/(r-2R)^(2)g t F g t (KQ)/r^(2)`

Answer

C

Explanation

As R is comparable to r, so there is induced effect.