The efficiency of Carnot’s heat engine is 0.5 when the temperature of the source is T 1 and that of sink is T 2 . The efficiency of another Carnot’s heat engine is also 0.5. The temperature of source and sink of the second engine are respectively
A
2T 1 , 2T 2
B
2T 1 , 
C
T 1 + 5, T 2 – 5
D
T 1 + 10, T 2 – 10
Text Solution
Verified by ExpertsThe correct answer is:
A
Efficiency of carnot engine
For first Carnot’s heat engine, 
For second heat engine, 
Efficiency remains the same when both 
and 
are increased by same factor
Therefore, the temperature of source and sink of second engine are
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