Question: What is the maximum efficiency of a Carnot engine operating between two temperatures?

Options:

1. 100%
2. Depends on the working fluid
3. 1 - (T_c/T_h)
4. 1 - (T_h/T_c)

Correct Answer: 1 - (T_c/T_h)

Solution:

The maximum efficiency of a Carnot engine is given by the formula η = 1 - (T_c/T_h), where T_c is the cold reservoir temperature and T_h is the hot reservoir temperature.