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Q7. A balanced star connected three phase load has a coil of inductance 0.2 H and resistance 50 W 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.