SSC SSC JE Electrical 2025 Mock Test Series (Paper 1 & Paper 2) Electrical Machines Alternator and Synchronous Motors
If the speed of a 3-phase, 400 V, 50 Hz synchronous motor is tripled, the efficiency of the machine will _______.
1
become zero
2
reduce to one-third
3
remain constant
4
become 3 times