Physics

at thie circle s center, what is of .. 26 GO In Fig. 29-54a, wire 1 consists of a circular are and Tw radial lengths; it carries current i, = 0.50 A in the direction indicated. Wire 2, shown in cross section, is long, straight. and - pendicular to the plane of the figure. Its distance from the came on the arc is equal to the radius R of the arc, and it carries a cen that can be varied. The two currents set up a net magnetic field f the center of the arc. Figure 29-54b gives the square of the be magnitude B2 plotted versus the square of the current is. The = cal scale is set by B? = 10.0 X 10 10 T?. What angle is subtender the arc? B2 B2 (10-10 T?) 19 e R 0 5 (A2) (a) ( 6 )