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Resistance of coaxial

  1. Apr 22, 2014 #1
    1. The problem statement, all variables and given/known data
    Determine the insulation resistance in a coaxial cable of length L, with conductivity, as shown in Figure assume that the current density J is radial direction.

    figura2.png

    3. The attempt at a solution

    so i was wondering if this approach is correct,

    consider a sequence of cylindrical shells of radius r and thickness dr. Each shell has a resistance dR given by:

    image.png
     
  2. jcsd
  3. Apr 26, 2014 #2

    rude man

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    This has already been posted and responded to.
    The method is correct this time (I seem to recall it changed from the last post).
     
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