Question

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

• A. $\frac{2 q }{\varepsilon_{0}}$
• B. $\frac{3 q }{\varepsilon_{ 0 }}$
• C. $\frac{-5 q}{\varepsilon_{0}}$
• D. $q \varepsilon_{0}$

Answer 1

Answer: (A)

Total charge enclosed $=4 q -2 q$
$=2q$
$\phi=\frac{ q _{ en }}{\varepsilon_{ 0 }} $
$\phi=\frac{2 q }{\varepsilon_{ 0 }}$