Electrical Machines
The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are

 2, 3, 4, 5
 2, 3, 4
 1, 3, 4, 5
 1, 2, 3, 4 and 5

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
With the increase in speed of DC motor

 Both back emf as well as line current increase.
 Both back emf as well as line current fall.
 Back emf falls and line current increase.
  Back emf increase but line current falls.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines