The electrostatic potential of a uniformly charged thin spherical shell of charge Q and radius R at a distance `r` from the centre

Options

A. `Q/(4 pi epsilon_(0)r)` for points outside and `Q/(4pi epsilon_(0)R)` for points inside the shell
B. `Q/(4 pi epsilon_(0)r)` for both points inside and outside the shell
C. zero for points outside and `Q/(4 pi epsilon_(0)r)` for points inside the shell
D. zero for both points inside and outside the sell

Answer

A

Explanation

If charge on a conducting sphere of radius R is Q then potential outside the sphere
`V_("out")=1/(4 pi epsilon_(0)) Q/r`
At the surface of sphere `V_(s)=1/(4 p epsilon_(0) Q/R`