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: Current in a wire

  1. Apr 21, 2009 #1
    1. The problem statement, all variables and given/known data
    current flows in a wire of circular cross-section, made of a material of uniform conductivity s. show the current is distributed uniformly across the cross-section.

    2. Relevant equations
    This should follow easily from the maxwell equations and j=sE i assume...

    3. The attempt at a solution
    my mind is completely blank, even though this should be really easy.. argh. help.
  2. jcsd
  3. Apr 23, 2009 #2
    Try Ampere's Law relating B to J inside the wire.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook