Electrical Machines
In synchronous generator, inverted V curve is drawn between

 field current on Y-axis and armature current on X-axis
 field current on X-axis and power factor on Y-axis
 field current on X-axis and armature current on Y-axis
 field current on Y-axis and power factor on X-axis

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

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

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