2. A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is
(a) 20 J
(b) – 20 J
(c) 400 J
(d) – 374 J
Ans. b
(64)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)