Electrical Machines
Two 3-phase AC generators are such that one has twice the linear dimensions of the other. The field windings of each are excited to give identical sinusoidal air-gap flux density waveform. Both have the same number of stator slots and identical winding patterns. The conductor/slot in a big generator is K times that of the smaller one. The value of K to get equal no load voltage at same frequency is

 1/4.
  1/2.
 8.
 4.

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Electrical Machines
In a 3 - Φ induction motor

  power factor at starting is high as compared to that while running.
  none of them.
  power factor at starting in the same as that while running.
  power factor at starting is low as compared to that while running.

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