A square surface of side `L m` is in the plane of the paper. A uniform electric field `vec(E )(V//m)`, also in the plane of the paper, is limited only to the lower half of the square surface (see figure). The electric flux in `SI` units associated with the surface is:

Options

A. Zero
B. `EL^2`
C. `EL^2//(2 epsilon_0)`
D. `EL^2//2`

Answer

A

Explanation

`phi =0`
Because no. of field line entering
= no. of field lines leaving. `[ theta = 90^@]`