Electrical Machines
Which of following winding is connected in series with armature winding of DC machine?

 Commutating pole winding.
 Auxiliary winding.
 Both Compensating and Commutating pole winding.
 Compensating winding.

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Electrical Machines
In speed control of DC Series motor, speed lower than the rated speed can be obtained by

 Connecting an additional resistance in the armature circuit.
 Connecting an additional resistance in the field circuit.
 Connecting an additional resistance in stator circuit.
 Any of the above.

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