Question

A Carnot engine having an efficiency of $\frac {1}{10}$ as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is

• A. 1 J
• B. 90 J
• C. 99 J
• D. 100 J

Answer 1

Answer: (B)

90 J

Answer 2

The correct option is (B): 90 J.