Two concentric hollow conducting spheres of radius r and R are shown. The charge on outer shell is Q. What charge should be given to inner sphere so that the potential at any point P outside the outer sphere is zero?

Question

Two concentric hollow conducting spheres of radius r and R are shown. The charge on outer shell is Q. What charge should be given to inner sphere so that the potential at any point P outside the outer sphere is zero? (A) -(Q r/R) (B) -(Q R/r) (C) -Q (D) -(2 Q R/r)

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/c425c7abb5bafff755be9c9b73a81f5e-.png" /> VP=(k q/x)+(K Q/x)=0 q=-Q

Q. Two concentric hollow conducting spheres of radius $r$ and $R$ are shown. The charge on outer shell is $Q$ . What charge should be given to inner sphere so that the potential at any point $P$ outside the outer sphere is zero?

$- \frac{Q r}{R}$

$- \frac{QR}{r}$

$- Q$

$- \frac{2 QR}{r}$

$V_{P} = \frac{k q}{x} + \frac{K Q}{x} = 0$
$q = - Q$

Q. Two concentric hollow conducting spheres of radius r and R are shown. The charge on outer shell is Q. What charge should be given to inner sphere so that the potential at any point P outside the outer sphere is zero?

−RQr​

−rQR​

−Q

−r2QR​