A neutral conducting spherical shell is kept near a charge `q` as shown .The potentilal at point `P` due to the induced charge is

Options

A. `(kq)/(r)`
B. `(kq)/(r')`
C. `(kq)/(r)-(kq)/(r')`
D. `(kq)/(CP)`

Answer

C

Explanation

`V_(P) = (ka)/(r') +V_("in") = V_(C) = (kq)/(r)`
`rArr V_("in")=(kq)/(r)-(kq)/(r)`.