Question: A coaxial transmission line has an inner solid conductor (radius =2.0 mm ) carrying a total current I_inner = +10A uniformly distributed over its cross-section.

A coaxial transmission line has an inner solid conductor (radius =2.0 mm ) carrying a total current I_inner = +10A uniformly distributed over its cross-section. A concentric hollow outer conductor extends from inner radius b=5mm to outer radius c=8mm and carries the return current -10A (uniformly distributed over the hollow cross-section). Using Ampre's law, find the magnitude of H (in A/m, one decimal place) at radial distance r = 6.9 mm from the center.

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