A synchronous motor will always stop when:______________?
Correct answer: C. excitation winding gets disconnected
- A. supply voltage fluctuates
- B. load in motor varies
- C. excitation winding gets disconnected
- D. supply voltage frequency changes
Explanation
If the excitation winding is disconnected, the rotor field collapses and the motor loses synchronism, so it cannot continue normal synchronous operation. Ordinary load or voltage changes do not necessarily make it stop.
Last updated
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
The typical value of SCR for modern alternator is____________?
If the efficiency of a machine is to be high, what should be low __________?
Which of the following does not change in a transformer ?
In a transformer the energy is conveyed from primary to secondary_________?
A transformer core is laminated to__________?