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Homework Help: Time taken for magnetic field to permeate a spherical volume

  1. May 6, 2013 #1
    1. For a stationary plasma of electrical conductivity 1.00 x108 Ω-1 m-1 estimate the time taken for a magnetic field to permeate a spherical volume of 3.0 m radius.

    I have been looking at the question for some time now and I am struggling with where to begin. Any help would be much appreciated.
  2. jcsd
  3. May 6, 2013 #2
    It's ok, think I have solved it. Using the diffusion and convection equation and setting U=0.
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