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Electric flux equation

  1. Oct 17, 2012 #1
    1. The problem statement, all variables and given/known data

    Im starting to read about the electric flux and gauss's law. Im reading two books, Serway and Schaums electromagnetics.

    The weird thing is that I'm getting different equations for the electric flux

    Serway says that the Electric flux ψ is ∫E ds = 1/ε ∫ρ dv = Q/ε

    While in other books I found that The Electric flux ψ is ∫ρ dv = Q

    What is the real Electric flux equation ?

    Thanks a lot.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 17, 2012 #2


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    In Schaum's, is the flux ψ defined in terms of the field E or the field D?
  4. Oct 17, 2012 #3
    it is defined in terms of D

    as ∫D ds = Q = ψ
  5. Oct 17, 2012 #4


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    Ok, that should account for the difference if you look at the relationship between E and D.
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