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Gauss's Law - electric flux through a spherical shell

  1. Feb 22, 2010 #1
    1. The problem statement, all variables and given/known data

    A spherical shell of radius 4 m is placed in a uniform electric field with magnitude
    7020 N/C. Determine the total electric flux through
    the shell. Answer in units of N ยท m^2/C.

    2. Relevant equations

    Gauss's Law

    3. The attempt at a solution

    I thought this would be as simple as E * 4[tex]\pi[/tex]r[tex]^{2}[/tex] , but it's not working

    I did 7020 * 4[tex]\pi[/tex]*4[tex]^{2}[/tex] and got 1411454.747, which isn't right. Is there something more to the problem that I'm missing?
  2. jcsd
  3. Feb 22, 2010 #2


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    Homework Helper
    Gold Member

    Is there any charge enclosed inside the shell? If there is no charge inside the shell, and the only electric field of concern is caused by some sort of charge distribution outside the shell, what does Gauss' law say about that?
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