Two long, straight wires a and b are 20 m apart, perpendicular to the plane of the paper as shown in figure (35-W3). The wire a carries a current of 96 A directed into the plane of the figure. The magnetic field at the point p at a distance of 10/11 m from the wire b is zero. Find (a) the magnitude and direction of the current in b, (b) the magnitude of the magnetic field B at the point s and (c) the force per unit length on the wire b. 2.0 m a 10/11 m 1 1.6 m b. 1.2 m .p Figure 35-W3