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JEE PHYSICS MCQ: THERMODYNAMICS
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Which of the following statement(s) is/are correct?
I. Efficiency of any heat engine cannot be greater than the efficiency of Carnot engine.
II. Heat flow never takes place from a body at lower temperature to a body at higher temperature.
I. Efficiency of any heat engine cannot be greater than the efficiency of Carnot engine.
II. Heat flow never takes place from a body at lower temperature to a body at higher temperature.
View answer and explanation
Correct option: A
Only I
Option A (Only I) is correct because the efficiency of any heat engine cannot exceed that of a Carnot engine operating between the same two temperatures, but heat can flow from a colder to a hotter body with external work.
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