The heat engine operating in reverse is called
Correct answer: B. Refrigerator
- A. Electric generator
- B. Refrigerator
- C. Carnot engine
- D. Electric motor
Explanation
A heat engine converts heat energy into mechanical work, and it operates in a cycle. When the same cycle is operated in reverse, i.e., when work is done on the system to transfer heat from a colder reservoir to a hotter reservoir, it becomes a refrigerator. A refrigerator absorbs heat from a low-temperature environment (cooling space) and transfers it to a higher-temperature environment (external surroundings).
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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