Electrical Machines
Ratio of starting torque to full load torque is minimum in

  Shunt motor.
  Differential compound motor.
  Cumulative compound motor.
  Series motor.

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Electrical Machines
The synchronous reactance( Xs) is the

 reactance due to leakage flux
 reactance either due to armature reaction or leakage flux
 combined reactance due to armature reaction and leakage flux
 reactance due to armature reaction of the machine

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