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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2006

  • question_answer
    Efficiency of engine working at \[40{}^\circ C\], \[20{}^\circ C\] is:

    A)  0.064%                                

    B)         0.64%

    C)         6.4%                                    

    D)         6.4%

    Correct Answer: C

    Solution :

    Efficiency of the engine is given by \[e=\left( 1-\frac{{{T}_{2}}}{{{T}_{1}}} \right)\times 100=\left( 1-\frac{273+20}{273+40} \right)\times 100\] \[=\left( 1-\frac{293}{313} \right)\times 100\] \[=0.64\times 100=6.4%\]


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