Question

Which of the following statements is true?

• A. Heat can be fully converted into work
• B. Work can be fully converted into heat
• C. The efficiency of a heat engine increases as the temperature of the heat source is increased while keeping the temperature of the heat sink fixed
• D. A cyclic process can be described when each effect is to transfer heat from a lower temperature to a higher temperature

Hint:

Understand the principles behind Carnot efficiency to solve heat engine-related questions effectively.

Answer 1

The Correct Option is C

The efficiency of a heat engine depends on the temperature difference between the heat source and sink. Greater temperature differences result in higher efficiency, as derived from Carnot’s theorem.