Electrical Machines
The coil spam

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

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Electrical Machines
The synchronous motor can be started by

  coupling it with a DC compound motor.
  providing damper winding in its rotor circuit.
  any of the above methods.
  coupling it with a small AC induction motor called the pony motor.

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