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

Resistivity and conductivity

  1. Mar 18, 2015 #1
    why resistivity of a metal increases with increase of temperature and conductivity of a semiconductor increases with increase in temperature??​
     
  2. jcsd
  3. Mar 19, 2015 #2

    Drakkith

    User Avatar

    Staff: Mentor

    The simple explanation is that in conductors an increase in temperature increases the chance that a charge will collide with ions or other electrons and lose energy. In semiconductors increasing the temperature increases the number of available charge carriers by exciting electrons into the conduction band. This puts more electrons in the conduction band and leaves behind a hole, both of which decrease the resistance of the semiconductor.

    For a much more detailed explanation, see here: http://en.wikipedia.org/wiki/Electrical_resistivity_and_conductivity#Temperature_dependence
     
  4. Mar 21, 2015 #3
    Got it.....Thanks
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Resistivity and conductivity
  1. Ionic conductivity (Replies: 2)

  2. Plasma conductance? (Replies: 3)

  3. Optical Conductivity (Replies: 3)

  4. Thermal conductivity (Replies: 3)

Loading...