4- A double squirrel-cage induction motor has (a) Two series winding in stator (c) Two parallel winding in rotor (b) Two parallel windings in stator (d) Two rotors moving in opposite direction 5 The rotor slots are slightly skewed in squirrel cage induction motor to ---------- (a) Increase the strength of rotor bars (b) Reduce the magnetic hum and locking tendency of ro (d) Provide ease of fabrication (c) Economize on the copper to be used 6- Stable operation of an induction motor is (a) Between zero slip and unity slip (b) Between zero slip and slip corresponding to maximum tor (e) Between 6.5 slip and 0.95 slip (d) Between slip corresponding to maximum torque and unity 7- Iron loss in the rotor of a 3-phase induction motor is negligible due to (a) Very low frequency of emf induced in the rotor (b) Very low emf induced in the rotor (c) Very low flux density in rotor parts (d) Constant magnitude of flux linking the rot

4- A double squirrel-cage induction motor has (a) Two series winding in stator (c) Two parallel winding in rotor (b) Two parallel windings in stator (d) Two rotors moving in opposite direction 5 The rotor slots are slightly skewed in squirrel cage induction motor to ---------- (a) Increase the strength of rotor bars (b) Reduce the magnetic hum and locking tendency of ro (d) Provide ease of fabrication (c) Economize on the copper to be used 6- Stable operation of an induction motor is (a) Between zero slip and unity slip (b) Between zero slip and slip corresponding to maximum tor (e) Between 6.5 slip and 0.95 slip (d) Between slip corresponding to maximum torque and unity 7- Iron loss in the rotor of a 3-phase induction motor is negligible due to (a) Very low frequency of emf induced in the rotor (b) Very low emf induced in the rotor (c) Very low flux density in rotor parts (d) Constant magnitude of flux linking the rot

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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Similar questions

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