Question: A coaxial cable is constructed from a central cylindrical conductor of radius r A = 1.80 cm carrying current I A = 7.40 A in
A coaxial cable is constructed from a central cylindrical conductor of radius rA = 1.80 cm carrying current IA = 7.40 A
in the positive x direction and a concentric conducting cylindrical shell with inner radius rB = 14.0 cm
and outer radius rC = 15.0 cm with a current of 12.0 A in the negative x direction (see figure below). What are the magnitude and direction of the magnetic field at the following points?

IB X X rc y P O IA 21A
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