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Question

Heat energy absorbed by a system in going through a cycle process is shown in the figure [$$V$$ in $$litres$$ and $$P$$ in $$K Pa$$] is
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A
107πJ
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B
104πJ
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C
102πJ
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D
103πJ
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Solution

The correct option is D $$10^2\, \pi\, J$$
Work done = Area within loop.
Area of an ellipse $$ = \dfrac{\pi}{4} a \times b$$
Area of an ellipse $$ = \dfrac{\pi}{4} (20 * 10^{-3})(20 * 10^{3})J = 10^{2} \pi J$$
Work done in loop $$ = 10^{2} \pi J$$
Hence option C is correct.

Physics

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