In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?
Correct answer: D. slip ring induction motor
- A. d.c. shunt motor
- B. schrage motor
- C. synchronous motor
- D. slip ring induction motor
Explanation
A slip-ring induction motor provides access to the rotor circuit through slip rings, allowing an injected EMF to control rotor current and speed. The other listed machines do not normally use this rotor-EMF injection method.
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