A metallic shell has a point charge 'q' kept | vedclass

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(B) The electric field lines originate from the positive point charge '$q$' inside the cavity and terminate on the inner surface of the metallic shell

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(B) The electric field lines originate from the positive point charge '$q$' inside the cavity and terminate on the inner surface of the metallic shell,such that they are perpendicular to the inner surface.Since the shell is metallic,the electric field inside the material of the shell is zero.However,the charge '$q$' induces an equal and opposite charge '$-q$' on the inner surface of the shell and an equal charge '$+q$' on the outer surface.The electric field lines outside the shell originate from the outer surface and extend to infinity,also perpendicular to the outer surface.Diagram $(b)$ correctly shows the lines originating from the point charge and terminating perpendicularly on the inner surface,and then originating from the outer surface.

$A$ metallic shell has a point charge '$q$' kept inside its cavity. Which one of the following diagrams correctly represents the electric lines of force?

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