Question

A Carnot's engine works between a source at a temperature of ${27}^0$ c and and a sink at-${123}^0$ efficiency is.

• A. 0.5
• B. 0.25
• C. 0.75
• D. 0.4

Answer 1

The correct option is A 0.5

$\text{Solution}:$

$T_1={27}^{o}C=300K$

$T_2=-{123}^{o}C=150K$

Now,

$\eta =1-\frac{T_2}{T_1}=0.5$

$\text{Hence A is the correct option}$