Question

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

If an enclosed gaussian surface is Zero then the incoming and outgoing electric lines are equal.

• According to the law, the net movement of an electric field through a closed surface is proportional to the electric charge being enclosed.  
• It is denotes as ∫s E.ds = q
• ​Thus, when the Gaussian surface is zero, then the number of incoming electric lines will be equal to the number of outgoing electric lines.