I need some help this question, is it correct?

rad h km/h cm/s km/s E m* 3 KW kPa MPa KN m*3/s E/cm* 3 ME HE MW kg/s cm/s* 2 ft/s*2In Figure in}, wire 1 consists of a circular arc and two radial lengths; it carries current i1 = 0.690 A in the direction indicated. Wire 2, shown in cross section, is long, straight, and perpendicular to the plane of the gure. Its distance from the center of the arc is equal to a the radius R of the arc. and it carries a current i2 that can be varied. The two currents set up a net magnetic eld B at the center of the arc. Figure (bl gives the square of the eld's magnitude 32 plotted versus the square of the current 22. The vertical scale is set by 352 = 11.9 x 10'10 T2. What angle is subtended bythe arc? (E?) (a) Number n 15.8 Units V