Electrical Machines
In a DC machine the armature mmf is

  stationary with respect to field poles.
  stationary with respect to armature.
 rotating with respect to field poles.
  rotating with respect to field poles as well as armature.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following statements is/are correct statements?

 EMF per turn in both the windings are equal
 EMF per turn in HV winding is less than EMF per turn in LV winding
All of these
 EMF per turn in HV winding is more than EMF per turn in LV winding

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are

 2, 4 ,5
 1, 4
 2, 3 , 5
 1, 3, 5

ANSWER DOWNLOAD EXAMIANS APP