My problem with conduction.

  • Thread starter rachelcapt
  • Start date
  • #1
rachelcapt
6
0
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 compared to a massive 17 for iron?

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

Thanks
 

Answers and Replies

  • #2
nbo10
418
5
The scattering cross section of ions and other impurities is higher in Fe.

JMD
 
  • #3
TonyG
28
0
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.
 
  • #4
rachelcapt
6
0
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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