In a liquid medium of dielectric constant `K` and of spherical gravity `2` two identically charged spheres are suspended from a fixed point by threads of equal length .The angle between them is `90^(@)` .In another medium of unknown dielectric constant `K^(1)` and specific gravity `4` the angle between them become `120^(@)` if density of material of spheres is `8gm//c c` then` K^(1)` is

Options

A. `(K)/(2)`
B. `sqrt(3)/(K)`
C. `sqrt(3)/(2)K`
D. `(K)/(sqrt(3)`

Answer

4

Explanation

`F=mg=Tantheta`