The no load current in a transformer lags behind the applied voltage by an angle of about

A. 180°

B. 120°

C. 90°

D. 75°

Answer: Option D

This Question Belongs to Electrical Engineering >> Transformers

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Comments ( 2 )

  1. Rahul Kumar
    Rahul Kumar :
    5 years ago

    Ideally a transformer draws the magnetizing current, lags primary applied voltage by 90°. 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 lag behind applied voltage by exactly 90° but it lags somewhat less than 90°. It is in practice generally about 75°.

  2. Kumar Phuldev
    Kumar Phuldev :
    5 years ago


Related Questions on Transformers

A good voltage regulation of a transformer means

A. output voltage fluctuation from no load to full load is least

B. output voltage fluctuation with power factor is least

C. difference between primary and secondary voltage is least

D. difference between primary and secondary voltage is maximum