Electrical Machines
For an ideal transformer the winding should have

 minimum resistance on primary side and maximum resistance on secondary side
 equal resistance on primary and secondary side
 maximum resistance on primary side and least resistance on secondary side
 no ohmic resistance on either side

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Electrical Machines
An ideal synchronous motor has no starting torque because

  relative velocity between stator and rotor mmf’s is not zero.
 rotor winding is highly reactive.
 relative velocity between the stator and rotor mmf’s is zero.
 rotor is made up of salient poles.

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