1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calculating electron mobility in a rod

  1. Apr 8, 2010 #1
    Studying for final, this is one of the suggested questions, I have no idea how to approach it.

    1. The problem statement, all variables and given/known data
    A cylindrical aluminum rod of 2 mm in diameter and 5 cm in length has a thermal conductivity of 237 W m-1 K-1 at 300 K. Calculate the electron mobility in the rod if aluminum has 3 valence electrons per atom, density of 2.7 g cm-3 and atomic mass of 26.98.

    2. Relevant equations
    The way i see it is i need to calculate conductance and then drift mobility
    c = e*n*Md

    trying to find Md

    3. The attempt at a solution
    I can find the number of electrons/cm^-3
    but i have no idea where to go from there.

    How is electrical conductivity dependent on thermal conductivity??
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted