A charge $q$ is placed at the center of one of the surface of a cube. The flux linked with the cube is:

• Correct answer
  A

  $\frac{q}{2 \epsilon_0}$
• B

  $\frac{q}{8 \epsilon_0}$
• C

  Zero
• D

  $\frac{q}{4 \epsilon_0}$

Solution

From
$\begin{aligned} & 2 \phi=\frac{\mathrm{q}}{\epsilon_0} \\ & \phi=\frac{\mathrm{q}}{2 \epsilon_0}\end{aligned}$

Hence, the correct answer is option: 'A'.