Q 12-01-015NEETJEE MainMedium
A charge $q$ is placed at one corner of a cube. The electric flux through the whole surface of the cube is
Answer: (C) $\dfrac{q}{8\epsilon_0}$
Concept. Eight identical cubes meeting at the corner would enclose the charge symmetrically.
Step 1. Share. This cube gets $\dfrac18$ of the total flux $\dfrac{q}{\epsilon_0}$: $\dfrac{q}{8\epsilon_0}$.
Answer. $\dfrac{q}{8\epsilon_0}$ (Option C).
Solution by Sreeraj P, M.Sc Physics