Rankers Physics

Thermal Physics: Practice Problem & Solution

The efficiency of a Carnot engine operating with reservoir temperature of $100\text{ }^\circ\text{C}$ and $-23\text{ }^\circ\text{C}$ will be: (1997)
$\frac{373+250}{373}$
$\frac{373-250}{373}$
$\frac{100-23}{100}$
$\frac{100+23}{100}$

Solution Explained:

To solve this problem, we apply the core principles of Thermal Physics. Understanding the underlying formula is key to arriving at the correct answer below:

Efficiency $\eta = 1 - \frac{T_2}{T_1} = 1 - \frac{250\text{ K}}{373\text{ K}} = \frac{373-250}{373}$.

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