Which of the following graphs between pressure ‘P’ versus volume ‘V’ represent the maximum work done ? (A) 2.0 1.0 (0,0) 22.4 44.8 V/L p bar (B) 2.0 (0,0) 22.4 V/L p bar (C) 2.0 1.0 (0,0 22.4 44.8 V/L

Question

Which of the following graphs between pressure ‘P’ versus volume ‘V’ represent the maximum work done ?

(A) 2.0 1.0 (0,0) 22.4 44.8 V/L p bar
(B) 2.0 (0,0) 22.4 V/L p bar
(C) 2.0 1.0 (0,0 22.4 44.8 V/L p bar
(D) 2.0 1.0 (0,0) 22.4 44.8 V/L p bar

Prashant Kotian · Accepted Answer

Correct answer: D. Area under the P v/s V curve, is equal to magnitude of work. In option (2) work done is zero while in remaining options net work done is negative due to expansion. NTA has given the answer without considering the negative sign that is considered only magnitude.

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