railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Alternator and Synchronous Motors
A 3-phase synchronous generator is operating at 0.8 pf lagging with respect to the excitation voltage. The nature of armature reaction mmf produced by the armature current is
1
Magnetizing
2
Demagnetizing
3
Cross-magnetizing partly magnetizing
4
Partly demagnetizing and partly cross-magnetizing