A) 97%
B) 87%
C) 83%
D) 76%
Correct Answer: A
Solution :
Power lost\[={{i}^{2}}R\] \[={{\left[ \frac{(10,000)}{250} \right]}^{2}}\times 0.2\] \[=320\,\,watt=0.32\,\,kW\] Efficiency\[=\frac{Power\,\,delivered\,\,by\,\,line}{Power\,\,supplied\,\,to\,\,line}\] \[=~\frac{10kW}{(10+0.32)kW}\] \[=0\times 97=\mathbf{97%}\]You need to login to perform this action.
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