A) 63.8%
B) 74%
C) 83.3%
D) 48%
Correct Answer: C
Solution :
(c) 83.3% Output power \[=140\text{ }W\] Input power \[=240\times 0.7=168\text{ }W\] \[\text{Efficiency=}\frac{\text{output}\,\,\text{power}}{\text{input}\,\,\text{power}}\text{ }\!\!\times\!\!\text{ 100}\] \[\text{=}\frac{140}{168}\times 100=83.3%\]You need to login to perform this action.
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