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MGIMS WARDHA MGIMS WARDHA Solved Paper-2008

  • question_answer
    A Carnot's engine operates with source at 127°C and sink at 27°C. If the source supplies 40 kJ of heat energy, the work done by the engine is

    A) 30 kJ                                     

    B) 10 kJ

    C) 4 kJ                                        

    D) 1 kJ

    Correct Answer: B

    Solution :

    Efficiency             \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\] \[=1-\frac{(273+27)}{(273+127)}\] \[=1-\frac{300}{400}\] \[=\frac{1}{4}\] \[\eta =\frac{Work\text{ }done}{Heat\text{ }\sup plied}\] \[\frac{1}{4}=\frac{W}{40}\] \[W=10kJ\]


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