(a) A 10 MVA 6.6, 3-phase star connected alternator gave open circuit and short circuit data as follows table
Field current in amps:, 25 50 75 100 125 150
OC voltage in kV 2,4 4,8 6,1 7,1 7,6 7,9
SC Current in Amps:, 288 528 875
Find the voltage regulation at full-load0.8 pf lagging by EMF method. Armature resistance per phase.