Question

Solve for the electric flux of a sphere if the radius r of the sphere is 10.57 nm and its charge q is 6.11 nC

Answer 1

The Gauss' law says

$$\phi=\oint EdA=\frac{q}{\epsilon_0}$$

$$\phi=\frac{6.11*10^{-9}}{8.85*10^{-12}}=690\:\rm N\cdot m^2/C$$