Physics - Electrostatics Question with Solution | TestHub

A disk of radius $\frac{a}{4}$ having a uniformly distributed charge $6\mathrm{C}$ is placed in the $x-y$ plane with its centre at $\left(\frac{-a}{2},0,0\right)$. A rod of length a carrying a uniformly distributed charge $8\mathrm{C}$ is placed on the $x$-axis from $x=\frac{a}{4}$ to $x=\frac{5a}{4}$. Two point charges $-7\mathrm{C}$ and $3\mathrm{C}$ are placed at $\left(\frac{a}{4},\frac{-a}{4},0\right)$ and $\left(\frac{-3a}{4},\frac{3a}{4},0\right)$, respectively. Consider a cubical surface formed by six surfaces $x=\pm \frac{a}{2},y=\pm \frac{a}{2},z=\pm \frac{a}{2}$. The electric flux through this cubical surface is