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No-load current in a transformer lags behind the voltage by about 75°.

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Answer : The no load current in a transformer lags behind the applied voltage by an angle of about 75°.

Description : Even at no-load, a transformer draws current from the mains. Why?

Answer : No-load current of a transformer has small magnitude and low power factor.

Description : In an actual transformer the iron loss remains practically constant from no load to full load because?

Answer : In an actual transformer the iron loss remains practically constant from no load to full load because core flux remains practically constant.

Description : A no-load test is performed on a transformer to determine?

Answer : A no-load test is performed on a transformer to determine magnetizing current and loss.

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