Ampere's Law Worksheet, Part 2

A coaxial cable consists of a solid inner conductor of radius a, surrounded by a concentric cylindrical tube of inner radius band outer radius c. The conductors carry equal and opposite currents I₀distributed uniformly across their cross-sections. Determine the magnetic field at a distance rfrom the axis for the following ranges of radii. On the figures below, draw the Amperian loop you use in each case.