railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Alternator and Synchronous Motors
A 10 pole, 25 Hz alternator can be directly coupled to and is driven by which of the following synchronous motors
1. Synchronous motor with 24 poles and 60 Hz frequency.
2. Synchronous motor with 16 poles and 30 Hz frequency.
3. Synchronous motor with 20 poles and 50 Hz frequency.
1
1, 2, and 3
2
1, 2 only
3
2, 3 only
4
1, 3 only