Learning Goal: To practice Problem-Solving Strategy 242 Magnetic force problems A long straight horizontal wire carries a current I = 3.50 A to the left. A positive 1.00 C charge moves to the right at a distance 3.50 m above the wire at constant speed v = 5000 m/s . (Eigure 1) What are the magnitude and the direction of the magnetic force on the charge? Figure 10f 1 3 F