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?
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
$-\frac{Q r}{R}$
- B
$-\frac{Q R}{r}$
- C
$-Q$
- D
$-\frac{2 Q R}{r}$
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- [AIEEE 2006]
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