The injected e.m.f. in the rotor of induction motor must have__________?
(A) zero frequency
(B) the same frequency as the slip frequency
(C) the same phase as the rotor e.m.f.
(D) high value for the satisfactory speed control
The injected e.m.f. in the rotor of induction motor must have__________?
(A) zero frequency
(B) the same frequency as the slip frequency
(C) the same phase as the rotor e.m.f.
(D) high value for the satisfactory speed control
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