engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Electrical Machines Transformer Transformer Working Principle
To generate emf, which of the following methods may be used?
(i) Stationary field system with rotating armature
(ii) Stationary armature with rotating field system
(iii) Stationary field and stationary armature1
(i), (ii), and (iii)
2
(ii) only
3
(i) only
4
(i) and (ii)