This question has Statement 1 and Statement 2. |
Of the four choices given after the Statements, choose the one that best describes the two Statements. |
Statement 1: An inventor claims to have constructed an engine that has an efficiency of 30% when operated between the boiling and freezing points of water. This is not possible. |
Statement 2: The efficiency of a real engine is always less than the efficiency of a Carnot engine operating between the same two temperatures. [JEE ONLINE 19-05-2012] |
A) Statement 1 is true, Statement 2 is true, and Statement 2 is not the correct explanation of Statement 1.
B) Statement 1 is true. Statement 2 is false.
C) Statement 1 is false, Statement 2 is true.
D) Statement 1 is true. Statement 2 is true, Statement 2 is the correct explanation of Statement 1.
Correct Answer: D
Solution :
[d] According to Carnot's theorem - no heat engine working between two given temperatures of source and sink can be more efficient than a perfectly reversible engine i.e. Carnot engine working between the same two temperatures. |
Efficiency of Carnot's engine, where, temperature of source temperature of sink |
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