efficiency of transformer
2009-01-12 5:53 am
In the textbook, using a thicker wire can increase the efficiency as the resistance decreases. However, from the formula, P=IV, isn't that power loss will increase as the current increases but the voltage remain unchanged?
回答 (1)
2009-01-18 9:05 am
✔ 最佳答案
Since efficiency of transformer = power output/power inputpower input = power output + heating loss on transformer coil
Using of thicker wire will reduce heating loss in the transformer coil, thus increasing efficiency.
The application of the equation P=VI is not appropriate to this situation as we are comparing the power outputs (or efficiencies) using thick and thin wires in the coil for a fixed power input so that P, V and I are fixed for comparison.
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