4.1. The magnetic flux density in the core of a 4.4-kVA, 4400/440-V, 50-Hz, step-down transformer is 0.8 T (rms). If the induced emf per turn is 10 V, determine (a) the primary and secondary turns, (b) the cross-sectional area of the core, and (c) the full-load current in each winding. A 300 coil in com