A charge +q is placed somewhere inside cavity of a thick conducting spherical shell of inner radius

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1. Electric Charges and Fields

medium

A charge $+q$ is placed somewhere inside the cavity of a thick conducting spherical shell of inner radius $R_1$ and outer radius $R_2$. A charge $+Q$ is placed at a distance $r > R_2$ from the centre of the shell. Then the electric field in the hollow cavity

A

depends on both $+q$ and $+Q$

B

is zero

C

is only that due to $+Q$

D

is only that due to $+q$

(KVPY-2010)

Solution

(d)

Following Gauss' law, electric field inside cavity is proportional to enclosed charge $+q$ only.

Standard 12

Physics

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