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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
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.
More Electrical Machines questions
The rotor copper losses, in a synchronous motor, are met by____________?
The standard full-load power factor ratings for synchronous motors are___________?
A synchronous motor working at leading power factor can be used as____________?
The speed regulation of a synchronous motor is always___________?
. In a synchronous motor which loss varies with load ?
For V-curves for a synchronous motor the graph is drawn between:_______________?