A very long cable made of a solid O 31 inner cylinder and a coaxial, cylindrical, outer shell with finite thickness. The inner cylinder caies a current I while the outer shell caies a current 21 in the opposite direction (see figure). What is the magnitude of the magnetic field at b

A very long cable made of a solid O 31 inner cylinder and a coaxial, cylindrical, outer shell with finite thickness. The inner cylinder caies a current I while the outer shell caies a current 21 in the opposite direction (see figure). What is the magnitude of the magnetic field at b

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A faulty coaxial cable. A very long cable made of a solid inner cylinder and a coaxial, cylindrical, outer shell with finite thickness. The inner cylinder carries a current I while the outer shell carries a current 2? in the opposite direction (see figure). What is the magnitude of the magnetic field at ? < ? < ?? Refer to the question on the image, kindly provide complete solutions.