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Homework Help: Intro physics question (electric fields)

  1. Sep 24, 2008 #1
    A figure showing electric field lines has two charges, q and -q. There are 24 lines emanating from the +q charge. 15 of these lines terminate at -q. There are 24 lines terminating at the q- charge. What is the net flux through the surface surrounding the two charges?
  2. jcsd
  3. Sep 25, 2008 #2
    Well it is a dipole with the two charges being of equal magnitude, so wouldn't the net flux be 0?
  4. Sep 25, 2008 #3


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    Homework Helper

    It's a closed surface right? Then just apply Gauss law. A more "conceptual" approach is to count how many lines are entering the closed surface and how many are exiting. Then find the net number of lines exiting the surface.
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