What will be the total flux through the faces of a cube with side 'a' if a charge is placed at 'B' mid point of an edge of the cube (shown in figure)?
Answer & explanation
Correct answer: option 3
The correct answer is Option (2) → $\frac{q}{2ε_0}$
When the charge Q is placed at B, middle point of an edge of the cube, it is being shard equally by 4 cubes.
$flux=\frac{q}{4ε_0}=\frac{q}{4ε_0}$