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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
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