railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Alternator and Synchronous Motors Alternator Voltage Regulation
In which of the following tests, which may be used to measure the synchronous impedance, should the reading be taken in a short time to avoid armature overheating?
1
Open-circuit characteristic test
2
Short-circuit characteristic test
3
Primary circuit characteristic test
4
Secondary circuit characteristic test