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Divergence of electric field

  1. Jul 15, 2015 #1
    Why is the divergence of electric field not zero for a material with non-constant conductivity?
  2. jcsd
  3. Jul 15, 2015 #2
    Why would it be?
  4. Jul 15, 2015 #3


    Staff: Mentor

    There are times when a material with non constant conductivity will have an E field with zero divergence. Can you think when that happens? So what is different?
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