Q
An induction motor can run at synchronous speed when____________?
-
A
A. It is run on load
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B
B. It is run in reverse direction
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C
C. It is run on voltage higher than the rated voltage
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D
D. E.m.f. is injected in the rotor circuit
Correct Answer:
D. D. E.m.f. is injected in the rotor circuit