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My problem with conduction.

  1. Aug 29, 2003 #1
    I thought the thing that makes a metal more conductive is the number of free electrons......

    How then is copper more conductive than iron when copper has only 8.47 (x10^22) free electrons per cm cubed compaired to a massive 17 for iron?

    If someone could explain this to me my face will go like this :-)

  2. jcsd
  3. Aug 29, 2003 #2
    The scattering cross section of ions and other impurities is higher in Fe.

  4. Aug 29, 2003 #3
    nbo10 is correct. You can verify this thru electrical resistivity values. The resistivity for Fe is about 5 times higher than it is for Cu.
  5. Aug 30, 2003 #4
    Thanks for your replies - that sounds right.

    Does anyone have any figures for the scattering cross sectional areas of Cu and Fe?
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