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- Subject
- Polyphase Induction Motorselectrical-engineering-mcqs › polyphase-induction-motors
- Published
- 12 Sept 2018
- Last updated
- 28 May 2026
Explanation
The starting torque of a slip ring induction motor is improved by inserting external resistance into the rotor circuit. This added resistance helps increase torque during startup by controlling the rotor current and slip. Adding inductance or capacitance does not have the same effect on starting torque.
More Polyphase Induction Motors MCQs
Practice related questions from the same subject.
- 1.What is the effect of adding resistance to the stator winding of an induction motor?
- 2.How can the starting torque of a three-phase induction motor be enhanced?
- 3.At what speed does the rotor of an induction motor operate?
- 4.In a star-delta starter used for an induction motor, what is the voltage applied to each stator phase relative to the line voltage?
- 5.In which situation is a slip ring motor favored over a squirrel cage induction motor?
- 6.Which types of motors can utilize a reduced voltage starter?
- 7.In which situation is a squirrel cage induction motor generally not chosen?
- 8.Which type of induction motor generally requires the least maintenance?
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