1. Tardigrade
  2. Question
  3. Physics
  4. 6. An ideal heat engine gives out heat at 77° C to have a 30 % of efficiency. The temperature of the source is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. 6. An ideal heat engine gives out heat at $77^{\circ} C$ to have a $30 \%$ of efficiency. The temperature of the source is

KCETKCET 2022

Solution:

$=1-\frac{T_{2}}{T_{1}}=1-\frac{350}{T_{1}}=0.3$
$0.7 T_{1}=350$
therefore $T_{1}=\frac{350}{0.7}=500 \,K=227^{\circ} C$