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Gauss's Law and Flux

  1. Feb 8, 2008 #1
    [SOLVED] Gauss's Law and Flux

    ok so i have the biggest question of all i tried solving the following problem:

    55.3 million excess electrons are inside a closed surface. What is the net electric flux through the surface?

    now i tried the following equations:

    [tex]\Phi[/tex]= E . A = Qin/[tex]\epsilon[/tex]

    but i have the biggest question when there is excess electron does it mean that the electron field is negative, and if it does then that goes in Qin where then [tex]\Phi[/tex] would be equal to Qin/[tex]\epsilon[/tex], and epsilon being 8.85*10 (permittivity constant)

    well any help in solving this problem is very grateful
    Last edited: Feb 8, 2008
  2. jcsd
  3. Feb 8, 2008 #2
    You can solve for the enclosed charge, since the elementary charge of an electron (-1.60*10^-19 C) and the number of electrons is known. Just use Q/epsilon to solve for flux.
  4. Feb 8, 2008 #3
    oh wow that was easy, i always see things harder then they are, thanks terbum
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