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

Drift Speed of the Conduction Electrons

  1. Nov 1, 2010 #1
    1. The problem statement, all variables and given/known data

    An aluminum wire with a diameter of 0.100 mm has a uniform electric field of 0.200 V/m imposed along its entire length. The temperature of the wire is 50.0 C.

    a) Determine resistivity
    b) Current density
    c) Total current
    d) Drift speed of the conduction electrons

    2. Relevant equations

    p=p0[1+ alpha (T-T0)]
    A=[tex]\prod[/tex]d2/4
    J=I/A
    n=#carriers/volume
    I=nqAVd
    V=EL
    Volume=AL

    3. The attempt at a solution

    I had no difficulties finding the answers from a) to c) but at d) I can't find it.
    A friend of mine told me I had to find the length first, but I tried to find with with all the formulas I have but I can't seem to get anywhere.
     
  2. jcsd
  3. Jan 31, 2011 #2
    do you have the answer???????????????????????????????
     
  4. Jan 31, 2011 #3
    we have the same question
     
  5. Jan 31, 2011 #4

    ehild

    User Avatar
    Homework Helper

    What do the symbols I, n, q, A, V, d mean in the equation I=nqAVd?

    ehild
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook