Thursday, April 28, 2016

If a sinusoidal voltage source is connected to a power transformer, its no-load current would be

  1. Sinusoidal and lagging the voltage by ninety degrees
  2. Sinusoidal and lagging the voltage by less than ninety degrees
  3. Rich in third harmonic and its fundamental would lag the voltage by ninety degrees
  4. Rich in third harmonic and its fundamental would lag the voltage less than ninety degrees
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4 comments:

  1. UnknownMay 21, 2017 at 9:39 AM

    Why

    ReplyDelete
  2. UnknownJuly 14, 2020 at 3:43 AM

    Ans-d

    ReplyDelete
  3. UnknownJuly 14, 2020 at 3:46 AM

    But the transformer also has core loss current component which will be in phase with applied voltage. And no load current is nothing but the vector summation of these two currents. Hence, the no load current will not l,ag behind applied voltage by exactly 90° but it lags somewhat less than 90°.

    ReplyDelete
  4. UnknownJuly 14, 2020 at 3:47 AM

    But the transformer also has core loss current component which will be in phase with applied voltage. And no load current is nothing but the vector summation of these two currents. Hence, the no load current will not l,ag behind applied voltage by exactly 90° but it lags somewhat less than 90°.

    ReplyDelete

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