Electrical Machines
A single-winding single-phase motor has

  zero starting torque.
 high starting torque.
 starting torque equal to full-load torque.
 low starting torque.

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Electrical Machines
Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

 Stator mmf wave and resultant flux density.
 Rotor mmf wave and resultant flux density wave.
  Rotor mmf wave and stator mmf wave.
 Stator mmf wave and resultant mmf wave.

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