Electrical Machines
In a DC generator the actual flux distribution depends upon

  all of above.
  shape of the pole shoe.
 size of air gap.
  clearance between tips of the adjacent pole shoes.

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Electrical Machines
In a 3 - Φ induction motor

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

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Electrical Machines
DC Motor

  dc shunt motor with field weakening.
  dc series motor.
  dc shunt with armature resistance control.
  dc compound motor.

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