.A 480 V, 60 Hz, 400 hp, 0.8 PF leading eight pole delta connected synchronous motor has a synchronous reactance of 1.0 ohms and negligible armature resistance. Ignore its friction, windage and core losses for this problem. (a) If this motor is initially supplying 400 hp at 0.8 PF lagging, what are the magnitudes and angles of E and I^? (b) How much torque is this motor producing? What is the torque angle &? (c) If EA is increased by 15%, what is the new magnitude of the armature current? What is the motor's new power factor? The load is constant again. Notes: Ex-machine phase A internal voltage I₁ = machine phase A current One horsepower (hp)-746 Watts