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
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
C. Its speed is varied by varying the amount of slip-frequency e.m.f. injected into the secondary circuit
D. It is capable of speed variation from zero to approximately twice the synchronous speed
Show Answer
Answer: B
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