I came up with 8.4 X 10^-7 and it was wrong. I usedamperes law and summed them and that's what I came upwith.
A coaxial cable (like those used in cable TV installations andwith VCRs) consists of a central conducting wire imbedded in acylindrical insulating core, which is then surrounded by anotherouter conducting cylinder usually made of wrapped aluminum foil orcopper braid. Suppose such a cable carries a current of2.10 A flowing in one direction alongthe wire and 2.10 A flowing in theopposite direction along the foil. Use Ampère's Law to findthe magnitude of the magnetic field at a radial distance r= 1.0 mm that is betweenconductors?


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