NEET Physics Thermodynamics Questions Solved


In a Carnot engine, when T2 = 0°C and T1 = 200°C, its efficiency is η1 and when T1 = 0°C and T2 = –200°C, its efficiency is η2, then what is η1 /η2 ?

(1) 0.577

(2) 0.733

(3) 0.638

(4) Can not be calculated

(1) η=1T2T1=T1T2T1

η1=(473273)473=200473 and η2=27373273=200273

So required ratio η1η2=273473=0.577

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