31. II A long wire carrying a 6.00 A current reverses direction by means of two right-angle bends, as shown in Figure 20.619. The part of the wire where the bend occurs is in a magnetic field of 0.666 T confined to the circular region of diameter 75 cm, as shown. Find the magnitude and direction of the net force that the magnetic field exerts on this wire. Figure 20.61 Magnetic-field region 6.00 A 45.0 cm K 75 cm