Question

The temperature of reservoir of Carnot's engine operating with an efficiency of 70% is 1000K. The temperature of its sink is

• A. 300 K
• B. 400 K
• C. 500 K
• D. 700 K

Answer 1

The correct option is A

300 K

$\eta =1-\frac{T_2}{T_1}\Rightarrow \frac{70}{100}=1-\frac{T_2}{1000}\Rightarrow T_2=300K$