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A single-phase 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at ful] load, unity power factor. If it is reconfiguredas a 500 V/75O V auto-transformer, its efficiency at its new rated load at unity power factor will be | |
A. | 0.95752 [Wrong Answer] |
B. | 0.97851 [Wrong Answer] |
C. | 0.98276 [Correct Answer] |
D. | 0.99241 [Wrong Answer] |