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Calculating energy of electric field

  1. Jun 16, 2010 #1
    1. The problem statement, all variables and given/known data
    (a) Consider two concentric spherical shells, of radii a and b. Suppose the inner shell
    carries a charge q and the outer shell carries -q (both of them uniformly distributed
    over the surface). Calculate the energy of the electric field in this configuration.

    2. Relevant equations

    3. The attempt at a solution
    I was just wondering if this would result in a net charge of zero, thus no electric field? And consequently no energy?
  2. jcsd
  3. Jun 16, 2010 #2
    There is no electric field outside the shells and inside the inner shell, but how about the space between the shells?
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