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JEE Mains 30-Jan-2023 Shift 2 Solved Paper

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Question : 12

Total: 90

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Efficiency of a reversible heat engine will be highest at −273∘C temperature of cold reservoir.
Reason R : The efficiency of Carnot's engine depends not only on temperature of cold reservoir but it depends on the temperature of hot reservoir too and is given as η=(1−‌

).
In the light of the above statements, choose the correct answer from the options given below :

[30-Jan-2023 Shift 2]

A is true but R is false
Both A and R are true but R is NOT the correct explanation of A
A is false but R is true
Both A and R are true and R is the correct explanation of A

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