Electrical Machines
In auto transformer if the turn ratio is K, what is the power transferred inductively?

None of these
 both A and B
 K × input power
 (1-K) × input power

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

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