Pv Diagram Work
Mediumphysics
Work in a PV diagram for expansion equals?
Select the correct option:
Solution
Incorrect! Answer:
Area under curve
- Integral Definition: Work done during a volume change from V1 to V2 is W=∫V1V2PdV.
- Graphical Significance: In a Pressure vs Volume (P-V) plane, this integral represents the area under the path curve projecting onto the volume axis.
- Sign Rule: For expansion (V2>V1), work is positive. For compression, volume decreases and work is negative.
- Cycle: For a closed loop, the work done is the net area enclosed by the loop.
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About This Question
- Subject
- physics
- Chapter
- thermodynamics
- Topic
- pv diagram work
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Area under curve
- Integral Definition: Work done during a volume change from V1 to V2 is W=∫V1V2PdV.
- Graphical Significance: In a Pressure vs Volume (P-V) plane, this integral represents the area under the path curve projecting onto the volume axis.
- Sign Rule: For expansion (V2>V1), work is positive. For compression, volume decreases and work is negative.
- Cycle: For a closed loop, the work done is the net area enclosed by the loop.
This medium difficulty physics question is from the chapter thermodynamics, covering the topic of pv diagram work. It appeared in the 2025 exam.
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