In this problem, we're going to use Gauss's law to get the net electric flux.

From Gauss's law:

$\overline{)\begin{array}{rcl}{\mathbf{\varphi}}_{\mathbf{n}\mathbf{e}\mathbf{t}}& {\mathbf{=}}& \mathbf{\int}\mathbf{E}\mathbf{\xb7}\mathbf{d}\mathbf{A}\mathbf{=}\frac{\mathbf{Q}}{{\mathbf{\epsilon}}_{\mathbf{0}}}\end{array}}$

Charge, Q = 10 nC = 10 × 10^{-9} C

ε_{0} = 8.85 × 10^{-12} C^{2}/Nm^{2}

A 10 nC point charge is at the center of a 4m x 4m x 4m cube. What is the electric flux through the top surface of the cube?

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