ISRO Electrical Engineering (EE) 2014 - Question 20

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The crawling in an induction motor is caused by

  • A. improper design of machine
  • B. low voltage supply
  • C. high loads
  • D. harmonics developed in the motor

Answer: D. harmonics developed in the motor

Explanation: Crawling is due to space harmonics (7th harmonic).

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