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Electrical Engineering MCQ Question & Answer in PDF Download

Q.

The phenomenon of crawling in a 3-phase induction motor may be due to

  • AUnbalanced supply voltage
  • B7th space harmonics of air gap filed
  • C7-time harmonics of voltage wave
  • D5th space harmonics
Correct Answer : (B)

7th space harmonics of air gap filed
Hints :

The phenomenon of crawling in a 3-phase induction motor may be due to 7th space harmonics of air gap filed.

Electrical Engineering MCQ Question & Answer in PDF Download
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