Electrical Machines
When the supply terminal of a DC shunt motor are interchanged

  The motor will run at its normal speed in the same direction as before.
 The motor will stop.
 The motor will run much faster in the same direction.
 The direction of rotation will reverse.

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

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

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