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Which of the following statements about Schrage motor is incorrect? | |
A. | it gives normally speed range of 3 to i but much speed ranges upto 15 to I and higher may also be obtained. [Wrong Answer] |
B. | It is cheaper than the slip-ring induction motor. [Correct Answer] |
C. | Its efficiency is higher than that of a slip-ring induction motor at all speeds except synchronous speed and is very much high at lower speeds [Wrong Answer] |
D. | While operating exactly at synchronous speed it behaves, in a sense. like a synchronous motor with compensating winding functioning as a dc exciter. [Wrong Answer] |