Why efficiency of a transformer, under heavy loads, is comparatively l – McqOptions

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1.	Why efficiency of a transformer, under heavy loads, is comparatively low?
A.	Copper loss becomes high in proportion to the output
B.	Iron loss is increased considerably
C.	Voltage drop both in primary and secondary becomes large
D.	Secondary output is much less as compared to primary input
Answer» B. Iron loss is increased considerably

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