An experimental arrangement used for magnetic field experimentation consists of a solid center-conducting rod and an outer coaxial cylindrical conductor. The space between the conductors 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 current in 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. (a) P, located at r = a (b) P, located at r = 3a (c) P, located at r = 5a (d) P, located at r = 7a

An experimental arrangement used for magnetic field experimentation consists of a solid center-conducting rod and an outer coaxial cylindrical conductor. The space between the conductors 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 current in 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. (a) P, located at r = a (b) P, located at r = 3a (c) P, located at r = 5a (d) P, located at r = 7a