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JEE Main 2011 Physics question

PhysicsThermodynamicsJEE Main 2011

A Carnot engine operating between temperatures and has efficiency . When is lowered by 62 K, its efficiency increases to . Then and are, respectively :

Answer: (4)

Solution

, and \frac{T_2 - 62}{T_1}\frac$13

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Question ID VK-039301