Exam Question

10. A balanced star connected three phase load has a coil of inductance 0.2 H and resistance 50 in each phase. It is supplied at 415 V, 50 Hz. Calculate EACH of the following: (a) the line current; (b) the power factor; (c) the value of each of three identical delta connected capacitors to be connected across the same supply to raise the power factor to 0.9 lag; (d) the new value of the line current.