Question

Unit of electric flux is

Answer 1

We know that, electric flux through any surface is given by

\(\phi=\overrightarrow{E}.\overrightarrow{A}=EA \cos \theta\)

Unit of electric field, \(E\) is \(\text{N/C}\) and unit of area, \(A\) is \(\text{m}^2\)

\(\cos \theta\) is a ratio, so, it is unitless.

Hence, unit of electric flux is \(\dfrac{\text{N}}{\text{C}}.\text{m}^2=\text{N-m}^2 \text{/C}\)

So, option \((a)\) is correct.