A 4 kVA transformer has iron-loss of 200 W and full load copper loss o – McqOptions

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1.	A 4 kVA transformer has iron-loss of 200 W and full load copper loss of 200 W. The maximum efficiency at unity power factor will be
A.	90.9%
B.	85.6%
C.	80.6%
D.	70.9%
Answer» B. 85.6%

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