Question

A thin metallic spherical shell contains a charge on its surface. A point charge is placed at the centre of the shell and another charge is placed outside the shell. All the three charges are positive. Then, the force on charge is

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A

Towards left

B

Towards right

C

Upward

D

Zero

Medium
Solution
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Correct option is D)

Due to Electrostatic shielding, The metallic spherical shell acts as a shield and do not allow the electric field due to outside charges to penetrate through it.

Hence, electric field inside shell due to and is zero.
Therefore, no force will act on charge .

Hence, Correct answer is

Electrostatic shielding acts in case of closed metallic surfaces with cavity in which external field does not effect internal contents and internal field does not effect external contents. 

Solve any question of Electrostatic Potential and Capacitance with:-
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