A thin metallic spherical shell contains a charge Q on it. A point charge +q is placed at centre of&

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1. Electric Charges and Fields

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A thin metallic spherical shell contains a charge $Q$ on it. A point charge $+q$ is placed at the centre of the shell and another charge $q'$ is placed outside it as shown in fig. All the three charges are positive. The force on the charge at the centre is :-

A

zero

B

toward left

C

toward right

D

upward

Solution

The metallic spherical shell acts as a shield and do not allow the electric field outside to penetrate through it.

Hence, electric field inside shell due to $Q$ and $q_{1}$ is zero.

Hence, no force will act on charge $q$.

Standard 12

Physics

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