Electrical Machines
What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ?

 core loss only
 both 1 and 2
 Copper loss
 windage and friction loss

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Electrical Machines
Where the shunt generators are widely used?

 Where voltage variation is needed over a wide load range.
 Where often load fluctuation is occurred.
 Where the load is very high.
  Where a constant voltage is required over a narrow load range.

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Electrical Machines
Consider the following statements : Interpoles in dc machines 1. reducearmature reaction effects in the interpolar region 2. have the same dimension as main polls 3. have their windings connected in series with the armature 4. have same number of turns as the armature 5. have the polarity same as that of the main pole ahead in a motor From these, the correct statements are

 1, 2, 3 and 5
 1, 3 and 5
 1, 2 and 3
 1 and 3

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