Sign up ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.


Why does it say that the flux due to q_2 and q_3 through S is 0? Doesn't it contain a nonzero charge q_1?

Does anyone also know the difference between "no charge" vs "net charge is 0"? My book differentiates it.

share|cite|improve this question

1 Answer 1

up vote 3 down vote accepted

The surface $\mathrm{S}$ does indeed contain charge $q_1$, and so will have nonvanishing electric flux. However, $\mathrm{S}$ does not contain charges $q_2$ and $q_3$, so it will have zero total flux due to those charges.

share|cite|improve this answer
Thank you very much for the clarification. – Hawk Apr 30 '12 at 0:11

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.