Acast iron parallel magnetic circuit as shown below has two current-carrying coils, one with N1 = 581 turns and one with N2 = 1083 turns. The cross-sectional area of the center leg is twice that of the remainder of the core. The required dimensions are Lg = 1 mm, L1 = 115 mm, L2 = 35 mm, L3 = L1 - Lg = 114 mm. A1 = A3 = 10 mm x 10 mm, and A2 = 20 mm x 10 mm. For this problem, you can assume that the fringing effects are negligible. Given that 12 = 6.3 A, determine the coil current 11 needed to produce an air gap flux of og = 1.41 mWb. This flux should flow in the direction as indicated in the figure above. You may assume that for the cast iron, pr = 400 L L N1 N