Question

Gaus's law is given by ${\in }_0{\int }_s\overrightarrow{E}.d\overrightarrow{s}=q$, if net charge enclosed by a Gassian surface is zero then :

• A. E must be zero on the surface
• B. Number of incoming and outgoing electric lines are equal
• C. There is net incoming of electric lines
• D. None of the above

Answer 1

The correct option is B Number of incoming and outgoing electric lines are equal

${\in }_0{\int }_S\overline{E}.d\overline{s}=q$

When, Gaussian surface is $0$ then number of incoming electric lines $=$ number of outgoing electric lines will be zero.