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Arc AB is half section of ellipse (with AB as the major axis). An ideal gas is taken from A to B as shown in diagram. The work done by gas for A to B process is :[use π= 22/7]

(A) 11 J 

(B) 22 J 

(C) –11 J 

(D) –22 J

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Correct option:  (C) –11 J


Work done = – Area of semi–ellipse

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