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Solution


Q.

An engine operating between the boiling and freezing points of water will have                         [2023]

1.  efficiency more than 27%

2.  efficiency less than the efficiency of a Carnot engine operating between the same two temperatures

3.  efficiency equal to 27%

4.  efficiency less than 27%
1 2, 3 and 4 only  
2 2 and 3 only  
3 2 and 4 only  
4 1 and 2 only  

Ans.

(3)

η=(1-273373)×100=26.8%