Electrical Machines
In a synchronous motor torque or load angle δ ------------- with increase in load

 decreases
 increases
None of these
 remains unaffected

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Electrical Machines
Which of the following is done in speed control of DC motor by field flux control?

 Inserting an additional resistance in the field circuit.
 Inserting an additional resistance in the armature circuit.
 Inserting resistance to armature circuit and field circuit.
 Any of above.

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