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Which of the following statements about the working of Scharge motor is incorrect ? | |
A. | When injected e.m.f. boosts the secondary induced e.m.f. the motor runs at super synchronous speed [Wrong Answer] |
B. | As the two brushes of a set are opened out, i.e., their distance from each other is increased, magnitude of the e.mt between them is decreased [Correct Answer] |
C. | Its speed is varied by varying the amount of slip-frequency e.nri.f. injected into the secondary circuit [Wrong Answer] |
D. | It is capable of speed variation from zero to approximately twice the synchronous speed [Wrong Answer] |