Question

A physics instructor, in a lab, charged an electrostatic generator to 25 μC, then carried it into the lecture hall. The net electric flux in Nm2/C through the lecture hall walls is:

Answer 1

Solution

According to gauss law flux through the closed volume is given by

$\phi=\frac{\Sigma Q}{\epsilon_0}$

Here

$\phi=\frac{ 25\times10^{-6} }{8.85 \times10^{-12} }=2.82\times 10^6$ N-m²/C