The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?
Correct answer: D. during one cycle
- A. at any instant
- B. averagely
- C. during its operation
- D. during one cycle
Explanation
On a pressure-volume diagram, the area enclosed by a complete cycle equals the net work done, because work is found from the integral of pressure with respect to volume. Thus, the area ABCDA represents the work done during one complete cycle. A student may choose "during its operation," but the enclosed area specifically refers to the cyclic operation from the initial state back to it.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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