Find the net electric flux through the spherical closed surface shown in the figure below. The two charges on the right are inside the spherical surface. (Take q1 = +1.96 nC, q2 = +1.03 nC, and q3 = -3.09 nC.)
The Attempt at a Solution
I know this is a Gauss's Law problem. I began by treating each of the charges INSIDE the sphere as a point charge form Coulomb's Law. I am under the impression that the one outside has no effect on the flux through the sphere?
Thus I set up the equations
k(q1/r^2) + k(q2/r^2) = Net Flux
However, I do not know the radius of the sphere. So I assume this is not the right way to go about this.
I am also aware that the Electric field is radial.