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Homework Help: Electric Field Energy (dielectrics

  1. Sep 13, 2005 #1
    Im having some problems with this question

    Some cells in the human body have a layer of negative charge on the inner surface and a layer of positive charge of equal magnitude on the outer surface. The charge densities are +/- 5.0e-4 C.m^-2, the cell wall is 5nm thick and the cell wall material has a dielectric constant of K = 5.4

    Given that the cell is approx spherical which a radius of 3 micrometres, estimate the total electric field energy stored in the wall of the cell...

    any help would be much appreciated, thanks...
  2. jcsd
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