Q. The coefficient of performance of a Carnot refrigerator working between $30℃$ and $0℃$ is
A) 10
B) 1
C) 9
D) 0
Explanation
(c) Coefficient of performance
$K = \frac{T_{2}}{T_{1} - T_{2}} = \frac{273}{303 - 273} = \frac{273}{30} = 9.1 \approx 9$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.