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Force between charges and dielectrics

  1. May 9, 2008 #1
    suppose I have a charge q at (x=-d) and a charge q at (x=+d).
    the force between them is q^2/(4*pi*(eps_0)*4*d^2).

    now, I insert a dielectric (K) between (-d/2<x<d/2), and try to calculate the force now...

    it seems like it would be the same but it sounds strange...
    If I use the D field, it is not effected by the dielectrics, and thus I can see that the electrical field E is the same as before (D/eps_0) and thus the force is the same...

    could it be?????
  2. jcsd
  3. May 9, 2008 #2

    someone? please?
    i really need help with this...
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