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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

    clem

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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.
    http://www.kayelaby.npl.co.uk/general_physics/2_6/2_6_5.html
    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.
    http://www.matweb.com/search/PropertySearch.aspx.
    Bob S
     
    Last edited by a moderator: May 4, 2017
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