Parallel conducting tracks, separated by 1.50 cm, run north and south. There is a uniform magnetic field of 1.20 T pointing upward (out of the page). A 0.0400-kg cylindrical metal rod is placed across the tracks and a battery is connected between the tracks, with its positive terminal connected to the east track. The current through the rod is 1.90 A. Required:
Find the magnitude and direction of the magnetic force on the rod.