4-5. Assume that the field current of the generator in Problem 4-2 has been adjusted so th...

4-5. Assume that the field current of the generator in Problem 4-2 has been adjusted so that it supplies rated voltage when loaded with rated current at unity power factor.

(a) What is the torque angle of the generator when supplying rated current at unity power factor?

(b) What is the maximum power that this generator can deliver to a unity power factor load when the field current is adjusted to the current value?

(c) When this generator is running at full load with unity power factor, how close is it to the static stability limit of the machine?