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Which of the following statements associated with polyphase induction motor is/are correct? | |
A. | It can run in one direction only. [Wrong Answer] |
B. | It is simply a transformer whose magnetic circuit is separated by an air gap into two relatively movable portions, one carrying the primary and other the secondary winding. [Correct Answer] |
C. | It needs more maintenance than that required by a dc shunt motor. [Wrong Answer] |
D. | lt is more costly than a dc shunt motor of the same output rating. [Wrong Answer] |