Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

 1/2 times maximum value of flux due to any phase
 3 times maximum value of flux due to any phase
 equal to φm, where φm is the maximum flux due to any phase
 3/2 times maximum value of flux due to any phase

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

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

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