Suppose there is a configuration with coaxial current carrying cylindrical (infinitely long) conducting tubes as shown with one having radius a and the other having radius b. The currents on each of the tubes is I in the directions shown. There is an insulating material of permeability µ between the tubes. a) What is the magnetic field B between the tubes? b) What is the bound bulk current J, between the tubes (away from the boundaries at s = a and s = b)?

Suppose there is a configuration with coaxial current carrying cylindrical (infinitely long) conducting tubes as shown with one having radius a and the other having radius b. The currents on each of the tubes is I in the directions shown. There is an insulating material of permeability µ between the tubes. a) What is the magnetic field B between the tubes? b) What is the bound bulk current J, between the tubes (away from the boundaries at s = a and s = b)?