# Flux calculation using Gauss’s Theorem

by manayay
Tags: flux, flux field, gauss law
 P: 1 Qn: A uniform electric field of strength 300 N/C at an angle of 30º with respect to the x-axis goes through a cube of sides 5 cm. (a) Calculate the flux through each cube face: Front, Back, Left, Right, Top, and Bottom. (b) Calculate the net flux through the entire surface. (c) An electron is placed centered 10 cm from the left surface. What is the net flux through the entire surface? Explain your answer Ans: Applying Gauss’s law the net ﬂux can be calculated. And for option (B), i guess the flux will be 0. But not sure. can anyone explain all the 3 options?
Mentor
P: 10,840
 And for option (B), i guess the flux will be 0. But not sure.
Option B?
That is right, and Gauss gives you the reason (is there divergence of the field inside the cube?).

(a) cannot be solved with Gauss alone, but the integrals are easy to do.

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