A) 30 kJ
B) 10 kJ
C) 4 kJ
D) 1 kJ
Correct Answer: B
Solution :
Efficiency\[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\] \[=1-\frac{(273+27)}{(273+127)}\] \[=1-\frac{300}{400}\] \[=\frac{1}{4}\] \[\eta =\frac{\text{Work}\,\text{done}\,}{\text{Heat}\,\text{supplied}}\] \[\frac{1}{4}=\frac{\text{W}\,}{40}\] \[\Rightarrow \] \[W=10kJ\]You need to login to perform this action.
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