Thermodynamics Question 162
Question: A scientist says that the efficiency of his heat engine which operates at source temperature 127°C and sink temperature 27°C is 26%, then
[CBSE PMT 2001]
Options:
A) It is impossible
B) It is possible but less probable
C) It is quite probable
D) Data are incomplete
Show Answer
Answer:
Correct Answer: A
Solution:
$ {\eta _{\max }}=1-\frac{T _{2}}{T _{1}}=1-\frac{300}{400}=\frac{1}{4}=25% $ .
So 26% efficiency is impossible
