A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P a distance `R/2` from the centre of the shell is

Options

A. `(2Q)/(4pi in_(0) R)`
B. `(2Q)/(4pi in_(0)R)-(2q)/(4pi in_(0)R)`
C. `(2Q)/(4pi in_(0)R)+q/(4pi in_(0)R)`
D. `((q+Q))/(4pi in_(0))2/R`

Answer

C

Explanation

`V_(P)=(Kq)/R+(KQ)/(R//2)=(2Q)/(4pi in_(0)R)+q/(4pi in_(0)R)`