Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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 :-)

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

    JMD
     
  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?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: My problem with conduction.
Loading...