HINT: For both halves of this problem, make sure to consider the stronger magnetic field closer to the wire. A current I flows down thecentral conductor of a long,cylindrical coaxial cable. Thiscurrent is returned going in theother direction through the outerconductor. Let rị, r2, and r3 bethe relevant radii of the coaxialcable as shown above, andassume a homogeneous currentdensity in both layers of thecoaxial cable. Use Ampere'sCircuital Law to solve for themagnetic field that exists withinthe wire as a function of r.

Answered: Image /qna-images/answer/6d57dbb5-4112-456b-beb1-c3578e7ecb4c.jpg

Answered: A current I flows down the central…

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