Question

The coefficient of performance of a carnot refrigerator working between ${30}^{o}C$ and $0^C$ is

• A. 10
• B. 1
• C. 9
• D. 0

Answer 1

Answer: (C)

9

Given$:-$

$T_2=0^{0}C=273K$

$T_1={30}^{0}C=273+30=303K$

Formula to be used$:$

$\beta =T_2/T_1$

$=273/303-273$

$=273/30$

$=9.1$

$\therefore$ coefficient of performance $\left(\beta \right)$ of a carnot refrigerator is $9.1$

Hence,

option $\left(C\right)$ is correct answer.