Question

Find the flux through a spherical Gaussian surface of radius a=1 m surrounding a charge of 8.85 pC

Answer 1

The Gauss's law says

$$\Phi=\oint EdA=\frac{q}{\epsilon_0}$$ $$\Phi=\frac{8.85*10^{-12}}{8.85*10^{-12}}=1.00\:\rm N\cdot m^2/C$$