Multiple Choice Question (MCQ)
Question: What is the synchronous speed of a A.C 3 phase induction motor having 6 poles at a frequency of 50 Hertz
A.
800 rpm
B.
1000 rpm
C.
1200 rpm
D.
1440 rpm
Correct Answer: 1000 rpm
Explanation
Ns=(120 x Frequency)/Number of Poles
Ns=(120×50)/6=1000 RPM