Question

A charge +q is placed somewhere inside the cavity of a thick conducting spherical shell of inner radius R₁ and outer radius R₂. A charge – Q is placed at a distance r > R₂ 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 

Answer 1

Correct Option :- (D) is only that due to +q

Explanation :-

For a conductor electric field inside its cavity is only due to inside charge and not due to outside charge.