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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

  improve and terminal voltage will rise .
  worsen and terminal voltage will fall
  worsen and terminal voltage will rise.
 improve but terminal voltage will fall.

ANSWER DOWNLOAD EXAMIANS APP