Q4 of 27 Page 83

An ideal gas undergoes cyclic process ABCDA as shown in given P-V diagram (Fig. 12.4).

The amount of work done by the gas is



We know that total amount of work done = area under

P-V diagram.


According to the P-V diagram,


work done in process ABCDA = area of rectangle ABCDA


= AB× BC


=


=


=


∵ the process is anti-clockwise


∴ work done by the process is negative.


Hence, amount of work done by the gas =


option (b) is correct.

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