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Dielectric constant of a conductor

  1. Nov 27, 2009 #1
    i am reposting this question , earlier it had been deleted assuming it to be a "HOMEWORK QUESTION" ,
    well my question is ,
    can we define a dielectric constant for a conductor ?? is it conceptually meaningful?? if yes then why and what is it???
  2. jcsd
  3. Nov 27, 2009 #2


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    Science Advisor

    Yes. You can look up the value of the dielectric constant for conductors in reference books. It is discussed in EM texts.
  4. Nov 27, 2009 #3
    In this URL, Maxwell's equations are derived for lossy media with both conductance and dielectric constant
    http://pcawte.me.uk/documents/phd-bitmap/phdap1.html [Broken]
    In particular, look at Eq. (A18)- (A20).
    The complex propagator, which includes both a dielectric constant and conductance, is presented.

    In the following URL, look about 1/4 the way through the paper to find table of dielectric constant and loss tangents (meaning ac lossy or ac conductance) of solids.
    This table includes plastics, wood, rubbers, minerals, etc.

    This table below has a search function that allows combined conductivity and dielectric constant searches. I immediately found silicon and germanium (semi) conductors.
    Bob S
    Last edited by a moderator: May 4, 2017
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