A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is [Orissa JEE 2002] 
A) 20 J
B) ? 20 J
C) 400 J
D) ? 374 J
Correct Answer: B
Solution :
Work done by the system = Area of shaded portion on P-V diagram \[=(300-100){{10}^{-6}}\times (200-10)\times {{10}^{3}}=20\,J\]
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