Questions
An ideal heat engine exhausting heat at 77°C is to have a 30% efficiency. It must take heat at
a
127°C
b
227°C
c
327°C
d
673°C
detailed solution
Correct option is B
η=T1−T2T1 η=0⋅3 and T2=273+77=350K ∴ 0⋅3=T1−350T1 or T1=227∘CTalk to our academic expert!
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For which combination of working temperatures of source and sink, the efficiency of Carnot's heat engine is maximum?
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