Question

Electric flux over a surface in an electric field may be :

• A. positive
• B. negative
• C. zero
• D. positive, negative, zero

Answer 1

The correct option is D positive, negative, zero

$\to$ if E and Area vector are in same direction $\varphi$ - positive
$\to$ if E and vector are in opposite direction $\varphi$ - negative
$\to$ if charge enclosed by the surface is given is zero then $\varphi =0$