A 5-k VA, 220-V, 60-Hz, six-pole, Y-connected synchronous generator has a leakage reactance per phase of 0.78 ohms and negligible armature resistance. The armature-reaction EMF for this machine is related to the armature current by
![1607_e6567c7f-b379-43fc-a954-dfd4798f730c.png](https://secure.tutorsglobe.com/CMSImages/1607_e6567c7f-b379-43fc-a954-dfd4798f730c.png)
Assume that the generated EMF is related to field current by
![251_63020cea-94ca-45ed-ba98-c0e0215c38cf.png](https://secure.tutorsglobe.com/CMSImages/251_63020cea-94ca-45ed-ba98-c0e0215c38cf.png)
A. Compute the field current required to establish rated voltage across the terminals of a unity power factor load that draws rated generator armature current.
B. Determine the field current needed to provide rated terminal voltage to a load that draws 125 percent of rated current at 0.8 PF lagging.