A 3-phase hydroelectric synchronous generator is read to be 110 MW, 0.8 pf lagging, 6-kV, Y- connected, 50 Hz, 100-rpm. Determine:
(a) the number of poles
(b) the kVA rating
(c) the prime-mover rating if the full-load generator efficiency is 97.1 % (leave out field loss).
(d) the output torque of the prime-mover.