SAT Subject Physics Practice Question 528: Answer and Explanation

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Question: 528

14. Refrigeration is a process through which

A. heat is removed from the inside of the refrigerator.
B. cold air is produced inside the refrigerator.
C. hot air is removed from the inside of the refrigerator.
D. hot air is changed to a cold condensate inside the refrigerator.
E. hot air inside the refrigerator is expanded to remove its heat.

Correct Answer: A

Explanation:

The correct answer is (A). The refrigerator is essentially a heat engine that is being run in reverse. The refrigerator heats the room outside by removing heat energy from the enclosed and insulated refrigerator box. The process produces the cooling effect.

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