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- Subject
- Polyphase Induction Motorselectrical-engineering-mcqs › polyphase-induction-motors
- Published
- 12 Sept 2018
- Last updated
- 28 May 2026
Explanation
Increasing the air gap in an induction motor leads to a reduction in the power factor. This occurs because a larger air gap weakens the magnetic coupling, causing the motor to draw more reactive power. Other factors like windage losses, bearing friction, and copper losses are not directly affected by the air gap increase.
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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