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Grade 12th passThermal Physics

The temperature entropy diagram of a reversible engine cycle is given in the figure, It's efficiency is
  1. 33 %
  2. 67 %
  3. 50 %
  4. 25 %

Question image for The temperature entropy diagram of a reversible e
Profile image of Yogiraj
10 Years agoGrade 12th pass
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2 Answers

Profile image of Simran Bhattacharyya
9 Years ago
Efficiency= Work done/Q
W= 1/2 × 2T×S (Area of triangle)
   =T×S
Q= 1/2× 4t × S (Area of trapezium formed)
   =2T×S
Efficiency= W/Q ×100%
                  = 1/2×100
                  =50%
Profile image of Kushagra Madhukar
5 Years ago
Dear student,
Please find the answer to your question.
 
Efficiency = Work done/Q(Heat gained)
W = 1/2 × 2To ×So (Area of triangle)
    = To × So
Q = 1/2× 4To × So (Area of trapezium formed)
    =2To × So
Efficiency= W/Q × 100%
                  = ½ × 100
                  = 50%
 
Thanks and regards,
Kushagra

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