Question

17.
Gauss law is given by e. E.ds = q, if net charge
enclosed in gaussian surface is zero then :-
(1) E on surface must be zero
(2) incoming and outgoing electric lines are equal
(3) there is a net incoming electric lines
(4) none​

Answer 1

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Actually Welcome to the Concept of the Gauss law of surface charge.

The law states that, When an electric charge is enclosed inside a closed surface, the total electric field lines passing through it are given by..

⭐Qenclosed = E. ds

So when a charge is outside or on the surface of the object, the overall effect of field lines is zero.

⭐So when a charge is inside a closed surface, option (2) is correct.

⭐Incoming and Outgoing electric lines are equal.