A number of Carnot engines are operated at identical cold reservoir temperatures (T_ L ) . However, their hot reservoir temperatures are kept different. A graph of the efficiency of the engines versus hot reservoir temperature (T_ H ) is pl

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A number of Carnot engines are operated at identical cold reservoir temperatures (T_ L ) . However, their hot reservoir temperatures are kept different. A graph of the efficiency of the engines versus hot reservoir temperature (T_ H ) is plotted. The correct graphical representation is

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Correct answer: 1

Efficiency of a Carnot's engine is given as =1- T_ L T_ H where, T_ L = temperature of cold reservoir and T_ H = temperature of hot reservoir. At constant T_ L , we can say that, with the increase in the valuc of T_ H , will also incrcasc. So, the graph between efficiency and T_ H is correctly depicted in option (b).

A number of Carnot engines are operated at identical cold reservoir temperatures (T_ L ) . However, their hot reservoir temperatures are kept different. A graph of the efficiency of the engines versus hot reservoir temperature (T_ H ) is plotted. The correct graphical representation is

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