Question

The flux of electric field due to these charges through the surface $S$ is

• A. $\frac{2q}{{\epsilon }_0}$
• B. $\frac{3q}{{\epsilon }_0}$
• C. $\frac{-5q}{{\epsilon }_0}$
• D. $q{\epsilon }_0$

Answer 1

Answer: (A)

Total charge enclosed $=4q-2q$
$=2q$
$\varphi =\frac{q_{en}}{{\epsilon }_0}$
$\varphi =\frac{2q}{{\epsilon }_0}$