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The magnetising reactance in each half of that circuit is

  • A.zero
  • B.half the value it would have for the whole machine
  • C.twice the value it would have for the whole machine
  • D.the same as it would have for the whole machine

Answer: B

Correct answer: half the value it would have for the whole machine

The double revolving field model splits the pulsating field into two components each of half the amplitude, and represents each by its own half of the equivalent circuit. Since the magnetising branch carries half the flux, its reactance is half the whole-machine value, and the two halves are placed in series.

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