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JEE Main 202226 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
26 June
Shift
Morning Shift
Subject
Physics
Chapter
Thermodynamics

JEE Main 2022 · 26 June · Morning Shift · Physics · Thermodynamics

The efficiency of a Carnot's engine, working between steam point...

The efficiency of a Carnot's engine, working between steam point and ice point, will be

Options

  1. A26.8126 . 81 %
  2. B37.8137 . 81 %
  3. C47.8147 . 81 %
  4. D57.8157 . 81 %

Correct answer

A. 26.8126 . 81 %

Step-by-step solution

Steam point =100°C=(100+273)K=373K= 100 ° C = \left(100 + 273\right)K = 373K

Ice point =0°C=(0+273)K=273K= 0 ° C = \left(0 + 273\right)K = 273K

Now,

η=1−TsinkTsourceη = 1 - \dfrac{{T}_{sink}}{{T}_{source}} =1−273373= 1 - \dfrac{273}{373}

=100373×100= \dfrac{100}{373} \times 100 % =26.81= 26 . 81 %

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