Frequency of three phase induction motor is doubled & number of poles is halved, synchronous speed becomes four times of original.

Q.  If the frequency of a three phase induction motor is doubled and number of poles is halved, then its synchronous speed is given by
- Published on 21 Oct 15

a. Remains same
b. Becomes double of the original synchronous speed
c. Becomes four times of the original synchronous speed
d. Becomes half of the original synchronous speed

ANSWER: Becomes four times of the original synchronous speed

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