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When will a slip-ring induction motor run at super synchronous speed? | |
A. | If a voltage is injected in the rotor circuit in phase opposition to the rotor induced emf. [Correct Answer] |
B. | If an emf is injected in the rotor circuit in phase with the rotor induced emf. [Wrong Answer] |
C. | If motor is coupled with active load. [Wrong Answer] |
D. | If motor is coupled with passive load. [Wrong Answer] |