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ELECTRICAL MACHINES

Electrical Machines
CRGO steel is used in the core of transformer to reduce

 eddy current loss.
  hysteresis loss.
 ohmic loss.
 both eddy current and hysteresis loss.

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Electrical Machines
If input of a transformer is square wave the output will be

  pulsed wave.
 triangular wave.
 square wave.
 sine wave.

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Electrical Machines
Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is

 equal to that of second transformer.
 none of these.
 less than that of second transformer.
  more than that of second transformer.

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Electrical Machines
The flux involved in the emf equation of a transformer has

 total value.
  maximum value.
 rms value.
 average value.

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Electrical Machines
The no load current in a transformer lags the applied voltage by

 0°.
 about 115°.
  about 75°.
 90°.

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