Q. 5 .A 500 kVA, 3-phase transformer has iron losses of 300 W and full load copperlosses of 600 W. The percentage load at which the transformer is expected to have maximum efficiency is
(A) 50.0%
(B) 70.7%
(C) 141.4%
(D) 200.0%
Answer:(B)
Explanation:
