Question

A cyclic process ABCD is shown in the figure P-V diagram. Which of the following curves represent the same process? 

• A. As shown in figure (a)
• B. As shown in figure (b)
• C. As shown in figure (c)
• D. As shown in figure (d)

Hint:

To transform thermodynamic cycles between graphs, always identify the nature of each process first.

Answer 1

The Correct Option is B

Step 1: In the given P-V diagram:
• AB is an isobaric process. 
• BC is an isothermal/curved path 
• CD is an isochoric process 
• DA is an isothermal/curved path 

Step 2: When the same cycle is represented in a P-T diagram: 
• Isobaric processes appear as horizontal lines 
• Isochoric processes appear as straight lines through origin 
• Isothermal processes appear as vertical lines 

Step 3: Comparing these characteristics with the given options, only diagram (b) correctly preserves the nature and sequence of processes.