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Electric flux

  1. Jul 3, 2009 #1
    1. The problem statement, all variables and given/known data
    A charge of 2.1 µC is 20 cm above the center of a square of side length 40 cm. The permittivity of free space is 8.85*10^-12 C^2/N*m^2. Find the flux through the square. Answer in units of N*m^2/C.

    2. Relevant equations

    3. The attempt at a solution
    I really need some help with starting this problem... =(
  2. jcsd
  3. Jul 3, 2009 #2


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    Maybe consider constructing a Gaussian surface that is a 6-sided cube?
  4. Jul 3, 2009 #3
    I haven't exactly gotten used to constructing formulas for Gaussian surfaces so could you explain how to do it?
  5. Jul 3, 2009 #4


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