Question: 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

A single-phase, 50 kVA, 250 V/500 V two winding transformer has an

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 its efficiency at its new rated load at unity power factor will be auto-transformer, (A) 95.752% (B) 97.851% (C) 98.276% (D) 99.241%

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