Question

A constant Electric field $\overrightarrow{E}=2\hat{i}$ exists in space. The electric flux through a square surface of side 2m with its surface tilted 60⁰ from the y axis is$4\frac{N{m}^2}{C}$.

• A. True
• B. False

Answer 1

The correct option is A

True

$\varphi =\overrightarrow{E}.\overrightarrow{A}$

You can take either $\overrightarrow{E}$ in the direction of area vector $\overrightarrow{A}$ or vice versa, it is the same thing and will give you same flux. It just looks different.

Now $\overrightarrow{E}$ in the direction of $\overrightarrow{A}$

$\varphi =EAcos{60}^0=\frac{4.2}{2}=4\frac{N{m}^2}{C}$.