Ampere's Law with Calculus Video Lessons

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Problem: A hollow cylindrical conductor (inner radius = a, outer radius = b) carries a current I uniformly spread over its cross section. Which graph below correctly gives the magnetic field as a function of the distance r from the center of the cylinder?

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A hollow cylindrical conductor (inner radius = a, outer radius = b) carries a current I uniformly spread over its cross section. Which graph below correctly gives the magnetic field as a function of the distance r from the center of the cylinder?

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