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Help on Flux

  1. Feb 25, 2014 #1
    I am confused about when you can use the formula ##\dfrac{q_{enc}}{\epsilon_0} = \Phi## for flux. Is it only when you have a closed surface with point charges? What if you have a closed surface with a non-point charge?
  2. jcsd
  3. Feb 25, 2014 #2


    Staff: Mentor

    The charge q is just the total charge enclosed by the Gaussian surface. The distribution doesn't matter. In particular, there is no distinction between point charges and a charge distribution.
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