An experimental arrangement used for magnetic field experimentation consists of a solid center-conducting rod and an outer coaxial cylindrical conductor. The space between theconductors is filled with a good insulating material. The figure below shows a cross section of such an arrangement. The current in the center rod is 2.50 A out of the page and the currentin the outer conductor has the same magnitude but is in the opposite direction. If the distance a is 3.56 mm, determine the magnitude of the magnetic field at the following locations.P,P,(a)P, located at r = a(b)located at r = 3aT(c)P, located at r = 5a(d)P, located at r = 7a

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