engineering recuitment NHPC JE & THDC JE 2023 Mock Test Electrical Machines DC Generators Armature Reaction
The detrimental effects of armature reaction can be controlled by:
1. Increasing the length of air gap
2. Using commutating poles
3. Increasing the cross-section of pole pieces
Which of these is/are incorrect ?
1
Only 1
2
Only 3
3
2 and 3
4
1 and 2