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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    A Carnot engine whose efficiency is 50% has an exhaust temperature of 500 K. If the efficiency is to be 60% with the same intake temperature, the exhaust temperature must be (in K)

    A) 800

    B) 200    

    C) 400

    D) 600

    Correct Answer: C

    Solution :

    [c] \[\eta =1-\frac{{{T}_{1}}}{{{T}_{2}}}\text{ or }\frac{50}{100}=1-\frac{500}{{{T}_{1}}}\Rightarrow {{T}_{1}}=1000K\] Also, \[\frac{60}{100}=1-\frac{{{T}_{2}}}{1000}\Rightarrow {{T}_{2}}=400K\]


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