Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

 1600W, 800W
 800W, 1600W
 1400W, 1000W
 1000W , 1400W

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Electrical Machines
With the increase in speed of DC motor

  Back emf increase but line current falls.
 Back emf falls and line current increase.
 Both back emf as well as line current fall.
 Both back emf as well as line current increase.

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