The torque developed by a 3-phase induction motor least depends on__________?
Correct answer: D. shaft diameter
- A. rotor current
- B. rotor power factor
- C. rotor e.m.f.
- D. shaft diameter
Explanation
Induction-motor torque is proportional to rotor current, rotor emf, and rotor power factor, but shaft diameter is only a mechanical design dimension and is not part of the torque equation. Therefore it has the least direct dependence.
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