In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be___________?
Correct answer: C. (l-s)Ns
- A. Ns
- B. s.N,
- C. (l-s)Ns
- D. (Ns-l)s
Explanation
Slip is defined as s = (Ns − N)/Ns, so rearranging gives N = (1 − s)Ns. The motor runs below synchronous speed unless the slip is zero.
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 starting torque of a squirrel-cage induction motor is___________?
Star-delta starting of motors is not possible in case of____________?
A double squirrel-cage induction motor has______________?
In case the air gap in an induction motor is increased____________?
In squirrel cage induction motors, the rotor slots are usually given slight skew in order to__________?
In medium sized induction motors, the slip is generally around___________?