A single-phase transformer has maximum efficiency of 98 %. The core lo – McqOptions

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1.	A single-phase transformer has maximum efficiency of 98 %. The core losses are 80 W and the equivalent winding resistance as seen from the primary side is 0.5 Ω. The rated current on the primary side is 25 A. The percentage of the rated input current at which the maximum efficiency occurs is
A.	35.7%
B.	50.6%
C.	80.5%
D.	100%
Answer» C. 80.5%

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