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

A
107πJ
B
104πJ
C
102πJ
D
103πJ

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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