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Question

A Carnot engine operates between T1 and T2. If there is an increase in source temperature by t and decrease in sink temperature by t. How the efficiency in both cases is related? 

A.


B.


C.


D.

None of these 

Answer ( Option B)


Solution

According to question,

Case-1: If there is an increases is source temperature by t .

Efficiency of Carnot engine becomes,

Case-2 : If there is decreases in sink temperature by t.

Efficiency of Carnot engine becomes,


or relation between efficiencies, subtracting equation (ii) from equation (i)

Hence, the correct option is (B).

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