Two Coaxial Cables Each Consist of a Thin Insulated Straight

question 38

Multiple Choice

Two coaxial cables each consist of a thin insulated straight wire surrounded by a cylindrical conductor of radius 0.900 cm.The cables are positioned 4.00 cm apart with the central wires parallel to one another.Each central wire is carrying a current of 2.20 A in directions antiparallel to one another.Each cylindrical conductor is carrying a current of 3.70 A in directions parallel to one another.What is the magnitude of the magnetic field midway between the cables?

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