Electrical Machines
In the V curve shown in figure below for a synchronous motor, the parameter of Y and X coordinates are, respectively

 Power factor and field current.
 Armature current and torque.
  Armature current and field current.
 Torque and field current.

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Electrical Machines
The coil spam

 must be exactly equal to people pitch.
 can never be equal to pole pitch.
  may or may not be exactly equal to people pitch.
 none of above.

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