GATE Papers >> EEE >> 2007 >> Question No 48

Question No. 48 EEE | GATE 2007

A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity power factor. If it is re-configured as a 500 V/750 V autotransformer, its efficiency at its new rated load at unity power factor will be

Answer : (C) 98.276%

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