Answer / Sunil Kumar Savita

The voltage regulation for a full load and 0.80 power factor lagging load transformer can be found by applying the Power Factor Correction Factor (PFCF). The PFCF for a lagging power factor is given as 1/|PF|^2. So, for a 0.80 power factor, the PFCF is 1/(0.8)^2 = 2.25. Therefore, the voltage regulation of the transformer will be 4.5% * 2.25 = 10%.

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