A) 500; 7.5%
B) 700; 10.5%
C) 1000; 21%
D) 1500; 15%
Correct Answer: B
Solution :
[b] \[Q={{Q}_{1}}+{{Q}_{2}}+{{Q}_{3}}+{{Q}_{4}}\] \[=6000-5500-3000+3500=+1000J\] \[W={{W}_{1}}+{{W}_{2}}+{{W}_{3}}+{{W}_{4}}\] \[=2500-1000-1200+x=+300+x\] In cyclic process, \[\Delta U=0\] Now, \[Q=\Delta U+W\] \[\text{or }1000=0+\left( 300+x \right)\] \[\therefore x=700J\] \[\eta =\frac{W}{{{Q}_{1}}+{{Q}_{4}}}\] \[=\frac{1000}{6000+3500}=10.5%\]You need to login to perform this action.
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