Question

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 $-273^{\circ} C$ 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 $n =\left(1-\frac{T_2}{T_1}\right)$.
In the light of the above statements, choose the correct answer from the options given below

• A. $A$ is true but $R$ is false
• B. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
• C. Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$
• D. A is false but $R$ is true

Answer 1

Answer: (B)

Both A and R are true and R is the correct explanation of A