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)V_("In")=(kq)/(r)-(kq)/(r')`