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A 2 kVA transformer has iron loss of 150 Watts and full - load copper loss of 250 Watts. The maximum efficiency of the transformer would occur when the total loss is _______ W .
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- 3 W
- 100 W
- 30 W
- 300 W
Correct Option: D
When variable loss becomes equal to constant loss, efficiency is maximum. Thus at maximum efficiency of this transformer, total loss = 150 × 2 = 300 W
