The effective resistance of a 3 phase, Y - connected 50 Hz, 2200 V synchronous generator is 0.5 per phase. On short circuit a field current of 40 A gives the full load current of 200 A. An emf (line to line) of 1100 V is produced on open circuit with the same field current. Determine the synchronous impedance. Also compute the power angle and voltage regulation at full - load 0.8 lagging p.f. (14)