in an alternater at what power factor the effect armature reaction is de-magnetizing....
A. at 0.8 p.f B. at 0.5 p.f c. at zero p.f D. at unity p.f
- Vaibhav
- 19 जनवरी
- 2 उत्तर
2 उत्तर
2 उत्तर
-
c0Modal content
-
At zero bcoz At unity power factor, the angle between armature current I and induced emf E, is zero. That means, armature current and induced emf are in same phase. But we know theoretically that emf induced in the armature is due to changing main field flux, linked with the armature conductor.1Modal content
View all vote's
अन्य संबंधित चर्चाएं
-
Transformer efficiency changes by reversing its terminals
-
capacitor
-
I want to apply in University of Washington Electrical Engineering. Do I need an undergraduate degree in Electrical Engineering to apply?
-
bridge bonding
-
Materials with lots of free electrons are called
-
pmmc instrument work only DC but not use ac ,why?
