Questions
Even Carnot engine cannot give 100% efficiency because we cannot :
a
Prevent radiation
b
Find ideal sources
c
Reach absolute zero temperature for sink
d
Eliminate friction
detailed solution
Correct option is C
percentage efficiency of carnot engine is η=(1−T2T1)×100 where T2=temperature of cold body or temperature of sink T1=temperature of hot body or temperature of source to get 100% efficiency,T2 (the temperature of cold body) should be 0K to achieve 0K is not possible hence even carnot engine cannot give 100% efficiencyTalk to our academic expert!
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In the following P-V diagram, two adiabatics cut two isothermals at temperatures T1 and T2 (figure). The value of Va/Vd will be
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