Electrical Machines
Series generators are used in which of the following applications?

All of these
 Arc welding.
 Used as boosters in dc distribution or transmission.
 Air crafts.

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

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