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Q#1 Transformers GATE EE 2018 MCQ +1 mark -0.33 marks

A single-phase 100kVA, 1000V/100 V. 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is

4.8

6.8

8.8

10.8

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