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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 39

  • question_answer
    A thermodynamic cycle takes in heat energy at a high temperature and rejects energy at a lower temperature. If the amount of energy rejected at the low temperature is 3 times the amount of work done by the cycle, the efficiency of the cycle is-

    A) 0.25      

    B)        0.33

    C) 0.67                 

    D)        0.9

    Correct Answer: A

    Solution :

    [a] \[{{Q}_{2}}=3W\] \[{{Q}_{1}}-{{Q}_{2}}=W\] \[{{Q}_{1}}=4W\] \[\eta =1-\frac{{{Q}_{2}}}{{{Q}_{1}}}=1-\frac{3}{4}=\frac{1}{4}\]               


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