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Q#1 Transformers GATE EE 2020 NAT +1 mark -0 marks

A single-phase, 4 kVA, 200 V/100 V, 50 ~Hz transformer with laminated CRGO steel core has rated no-load loss of 450 W. When the high-voltage winding is excited with 160 V, 40 Hz sinusoidal AC supply, the no-load losses are found to be 320 W. When the high-voltage winding of the same transformer is supplied from a 100 V, 25 Hz sinusoidal AC source, the no-load losses will be …………… W (rounded off to 2 decimal places).

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