A charge $Q$ is placed precisely at the centre of one of the faces of a cube. The electric flux pass

Question

A charge $Q$ is placed precisely at the centre of one of the faces of a cube. The electric flux passing through the remaining five faces of this cube is

Professor PC Thomas Classes · Answer

(a) : A charge $Q$ placed at the face centre of a cube is shared equally by two identical adjacent cubes. Therefore, the total flux associated with one such cube is $\frac{Q}{2\varepsilon_0}$. The electric field lines are parallel to the face on which the charge resides, meaning the flux through that specific face is zero. Thus, the entire flux of $\frac{Q}{2\varepsilon_0}$ passes through the remaining five faces of the cube.