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Electrical Machines

Electrical Machines
Total core loss is also called as -------------?

 Eddy current loss
 Hysteresis loss
 Magnetic loss
 Copper loss

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Electrical Machines
In which transformer, the tertiary winding is used?

 Star - delta
 Star - star
 Delta - delta
 Delta - star

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Electrical Machines
If an additional resistance is connected in series with a DC motor operating at rated speed, the speed of the motor will

  Remain unaltered.
  Reduce.
  Oscillate around the normal speed.
  Increase.

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Electrical Machines
Iron loss in a transformer mainly occurs in

 steel core in transformer.
 transformer insulating oil.
 winding of transformer.
 iron made tank of transformer.

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

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

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Electrical Machines
A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively?

 6 KVA
 10 KVA
 4 KVA
 0 KVA

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