# Gauss's Law, net electric flux

1. Sep 22, 2013

### yaro99

1. The problem statement, all variables and given/known data
The three small spheres shown in the figure below carry charges q1 = 4.30 nC, q2 = -7.70 nC, and q3 = 3.40 nC.

Find the net electric flux through each of the following closed surfaces shown in cross section in the figure.

2. Relevant equations
$\Phi$E=$\frac{Q_{encl}}{\epsilon_0}$

3. The attempt at a solution
Using the above equation, I got the right answers for S1 through S4, but I'm getting the wrong answer for S5:
$\Phi$E=$\frac{Q_{encl}}{\epsilon_0}$= $\frac{4.30-7.70+3.40}{\epsilon_0}$= $\frac{0}{\epsilon_0}$=0

2. Sep 22, 2013

### rude man

I think your answer is correct.

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