Physics - Magnetism Question with Solution | TestHub

According to Gauss's law, the electric flux through a closed surface is equal to $\frac{1}{{\epsilon }_0}$ times the net charge enclosed by the surface. Since, $q$ is the charge enclosed by the surface, then the electric flux $\varphi =\frac{q}{{\epsilon }_0}$. If charge $q$ is placed at a corner of cube, it will be divided into 8 such cubes. Therefore, electric flux through the cube is $${\varphi }^{\prime }=\frac{1}{8}\left(\frac{q}{{\epsilon }_0}\right)$$