Thermodynamics Question 300
Question: If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is
Options:
A) $ \frac{1}{3} $
B) $ \frac{1}{4} $
C) $ \frac{2}{5} $
D) $ \frac{2}{3} $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Efficiency $ \eta =\frac{W _{output}}{Heat _{input}}\frac{w}{3w}=\frac{1}{3} $
$ \eta =1-\frac{Q _{2}}{Q _{1}}=\frac{1}{3}\text{ }\therefore \frac{Q _{2}}{Q _{1}}=\frac{2}{3} $
