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Homework Help: Magnetic Field Inside an Electric Conductor

  1. Feb 10, 2010 #1
    1. The problem statement, all variables and given/known data
    The problem is simple: there is a coaxial cable where the current flows in one direction in the inside conductor and in the opposite direction in the outside conductor. I'm asked to find the magnetic field on a point situated in the space between the two (that space is filled with an electric insulator) and the magnetic field on a point situated in the middle of the outer conductor.

    2. Relevant equations
    Ampere's Law

    3. The attempt at a solution
    For the first, it's simple. I found the magnetic field created by each conductor using Biot-Savart's law and added them. For the second, I'm intrigued. Inside a conductor the electric field is zero, it acts as a Faraday's cage. What about the magnetic field?
  2. jcsd
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