Q.

When an alternator designed for operation at 60 Hz is operated at 50 Hz

  • AkVA rating will increase in the ratio of 1:2
  • Boperating voltage will reduce in the ratio of 5/6
  • Coperating voltage will increase in the ratio of 1:2
  • Doperating voltage will reduce in the ratio of  (5/6)2
Correct Answer : (B)

operating voltage will reduce in the ratio of 5/6

Hints :

When an alternator designed for operation at 60 Hz is operated at 50 Hz its operating voltage will reduce in the ratio of 5/6.

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