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A short section of coaxial cable consists of a line current along the z-axis from z...

A short section of coaxial cable consists of a line current along the z-axis from z = -L to z = L carrying current ?0?̂ surrounded by a hollow cylindrical shell (centered on the z-axis, top at z = L , bottom at z = -L) carrying a surface current ?⃗⃗ = ?0 (−?̂). Radius 2R

a. Find an expression for the magnetic field at an arbitrary point (x, y, z)

b. Draw a qualitative graph of the magnetic field as a function of position on the x-axis.

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