Electrical Machines
Dynamic braking is very effective for

 separately excited motors.
 differential compound motors.
 series motors.
 shunt motors.

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Electrical Machines
The coil spam

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

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Electrical Machines
For an ideal transformer the winding should have

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

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