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  4. Which of the following graphs between pressure and volume correctly shows isochoric change?

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Q. Which of the following graphs between pressure and volume correctly shows isochoric change?

Delhi UMET/DPMTDelhi UMET/DPMT 2004

Solution:

Isochoric process takes place in a system at constant volume, hence P-V graph is a straight line parallel to pressure axis represented by option [c].
Isobaric process takes place at constant pressure.
The P-V graph is a straight line parallel to V axis represented by option [b].