AP EAMCET · PHYSICS · Thermodynamics
A Carnot's engine has an efficiency of \(25 \%\) when its sink is at \(27^{\circ} \mathrm{C}\). If it has to be increased to \(40 \%\), what should be the temperature of the sink keeping the temperature of the source constant?
- A \(320 \mathrm{~K}\)
- B \(375 \mathrm{~K}\)
- C \(240 \mathrm{~K}\)
- D \(300 \mathrm{~K}\)
Answer & Solution
Correct Answer
(C) \(240 \mathrm{~K}\)
Step-by-step Solution
Detailed explanation
Efficiency of Carnot's engine, \[ \eta=25 \%=0.25 \] Temperature of sink, \[ T_2=27^{\circ} \mathrm{C}=273+27=300 \mathrm{~K} \] Temperature of source \(=T_1\)…
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