It has been determined by test that the synchronous reactance, Xs, and armature resistance, ra, of a 2,300-V, 500-KVA, three-phase synchronous generator are 8.0 Ω and 0.1Ω, respectively. If the machine is operating at rated load and voltage at a power factor of 0.867 lagging, find the generated voltage per phase and the torque angle.