Electrical Machines
If the excitation is critical, the power factor of the alternator is

 leading power factor.
 unity power factor.
None of these
 lagging power factor.

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Electrical Machines
The factors that are responsible for decrease in terminal voltage of a shunt generator are

  reduction in field current, effect of armature reaction, armature.
 armature resistance, effect of armature reaction.
 armature resistance, inter poles, armature.
  armature resistance, effect of armature reaction.

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