Objective Questions on Working Principle and Types of Induction Motor

  1. An induction motor works with

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  2. If all the stator coils of an induction motor are connected for the same magnetic polarity, there will be formed an equal number of

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  3. Uneven gap in an induction motor is likely to cause

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  4. In an induction motor, if the air gap is increased

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  5. Which of the following parameters in an induction motor influences the magnetizing reactance to the maximum extent?

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  6. The difference between the synchronous speed and actual speed of an induction motor is known as

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  7. In an induction motor, no load slip is generally

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  8. The injected emf in the rotor of induction motor must have

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  9. An induction motor with 1000 rpm speed will have

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  10. Slip of an induction motor is negative when

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  11. The shape of the torque /slip curve of induction motor is

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  12. As load on an induction motor goes on increasing

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  13. The speed characteristics of an induction motor closely resemble the speed-load characteristics of which of the following machines

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  14. In an induction motor, air gap flux density is usually kept low so as to

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  15. The rotor circuit of an induction motor under operating condiction is

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  16. The crawling in the induction motor is caused by

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  17. The 'cogging' of an induction motor can be avoided by

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  18. Slip-ring motor is recommended where

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  19. Low voltage at motor terminal due to

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  20. For induction motor normally

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