A charge q is placed at point D of the cube. Find the electric flux passing through the `EFGH` and face `AEHD`.

Answer

B, D

Explanation

If we make a bigger cube comprising of eight small cubes of size gine in the question with charge at centre (or at `D`).
Then, total flux through large closed cube `=q/epsilon_0`
There are 24 symmetrical faces like `EFGH` on outermost surface of this bigger cube.
Total flux from these 24 faces is `q/epsilon_0)`. Hence flux, from anyone force `=1/24 (q/epsilon_0)`
Electric lines are tangential to face `AEHD`. Hence, flux is zero.