You observe that a 15A current is flowing through a 100 m long straight wire that has a radius of 5 cm. Call this current 11. The wire is cylindrical in shape and the number density of charge carriers is 3 * 102% m-3 a) what is the B-field at r1=2cm ? b) what is the speed at which electrons are traveling in this wire? 5 cm 2 1 2 - .Now suppose there is another wire, also 100 m long, but of negligible thickness that is carrying a current |2=25A. The centers of the wires are r2= 10 cm apart. c} what is the magnitude of the B-force ON the wire carrying the 25A current? d} what is the direction of the B-force ON the 25A wire