# Resistance in a coaxial cable of length L

**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.

**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:

http://ift.tt/1jA2bCp

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