Thermodynamics - Result Question 48
50. The temperature of source and sink of a heat engine are $127^{\circ} C$ and $27^{\circ} C$ respectively. An inventor claims its efficiency to be $26 %$, then:
(a) it is impossible
[2001]
(b) it is possible with high probability
(c) it is possible with low probability
(d) data are insufficient.
Show Answer
Answer:
Correct Answer: 50. (a)
Solution:
(a) $\eta=1-\frac{300}{400}=\frac{100}{400}=\frac{1}{4} \eta=\frac{1}{4} \times 100=25 %$
Hence, it is not possible to have efficiency more than $25 %$.
