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Surface Charge Density and electric field

  1. Apr 21, 2012 #1
    1. The problem statement, all variables and given/known data
    A nonconducting wall carries charge with a uniform density of 8.55 µC/cm2.
    (a) What is the electric field 8.55 cm in front of the wall if 8.55 cm is small compared with the dimensions of the wall?

    2. Relevant equations

    σ= Q/A

    3. The attempt at a solution

    E=8.55/2 x 8.854x10^-12
  2. jcsd
  3. Apr 21, 2012 #2
    Don't think this is right, I feel like the factor that the 8.55cm from the wall should make a difference. Is that right?
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