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A 5 kVA, 50 V/100 V, single-phase transformer has a secondary terminal voltage of 95 V when loaded. The regulation of the transformer is
- 4.5%
- 9%
- 5%
- 1%
Correct answer: 5%
Solution
Rated secondary voltage is 100 V; under load it drops to 95 V. Voltage regulation = (100 - 95)/100 = 5%. The stored 9% is incorrect.
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