A) \[\eta \]=0.38
B) \[\eta \]=0.88
C) W=1596J
D) W=1400J
Correct Answer: D
Solution :
The efficiency of engine \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}=1-\frac{127+273}{327+273}\] \[=\frac{3-2}{3}\] \[\eta =\frac{1}{3}\] Further, \[\eta =\frac{W}{Q}\] \[\Rightarrow \] \[W=Q\eta \] \[=\frac{1000}{3}cal\] \[\Rightarrow \] \[W=\frac{1000\times 4.2}{3}J\] \[\Rightarrow \] \[W=1400\,J\]You need to login to perform this action.
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