A source is supplying a load through a 2-phase, 3-wire transmission system as shown in figure
below. The instantaneous voltage and current in phase-a are van = 220sin(100πt) V and ia =10sin(100πt) A respectively. Similarly for phase-b, the instantaneous voltage and current are v_bn =
220cos(100πt) V and ib = 10cos(100πt) A, respectively.