A hollow cylindrical (inner radius = 2.0 mm, outer radius = 4.0 mm) conductor carries a current of 24 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 5.0 mm from the axis of the conductor.
A. 0.96 mT
B. 1.7 mT
C. 0.55 mT
D. 1.2 mT
E. 0.40 mT
Answer: A
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