Question

A charge $q$ is placed at the centre of a cube. Then the flux passing through one face of cube will be

• A. $\frac{q}{\varepsilon_{0}}$
• B. $\frac{q}{2\varepsilon_{0}}$
• C. $\frac{q}{4\varepsilon_{0}}$
• D. $\frac{q}{6\varepsilon_{0}}$

Answer 1

Answer: (D)

$\frac{q}{6\varepsilon_{0}}$

Answer 2

Net flux through the cube $\varphi_{net} = \frac{Q}{\varepsilon_{0}};$ so flux through one face $\varphi_{face} = \frac{q}{6\varepsilon_{0}}$