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Heat and Thermodynamics question

2001 · Q162
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Heat and Thermodynamics question

2001 · Q162

NEETPhysicsHeat and ThermodynamicsMCQ+4 / −1
A scientist says that the efficiency of his heat engine which work at source temperature 127oC and sink temperature 27oC is 26%, then
  1. A
    it is impossible
  2. B
    it is possible but less probable
  3. C
    it is quite probable
  4. D
    data are incomplete.
View written solutionFree

Correct answer: A

Efficiency is maximum in Carnot engine which is an ideal engine.

∵η=400−300400×100%=25%\because \eta = {{400 - 300} \over {400}} \times 100\% = 25\%∵η=400400−300​×100%=25%

∴\therefore∴ efficiency 26% is impossible for his heat engine.

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