A conducting sphere of radius R having charge Q is placed in a uniform external field E. O is the centre of the sphere and A is a point on the sphere of the sphere such that AO makes an angle of `theta_(0)=60^(@)` with the opposite direction fo external field. calculate the potential at point A due to charge on the sphere only.

Answer

`(1)/(4piepsilon_(0))(Q)/(R)-(ER)/(2)`