Question

A Carnot engine working between ${27}^{o}C$ and ${127}^{o}C$ takes up 800 J of heat from the reservoir in one cycle. What is the work done by the engine ?

• A. 100J
• B. 200J
• C. 300J
• D. 400J

Answer 1

The correct option is B 200J

Work done by a Carnot's engine
$W=Q_H(1-\frac{T_C}{T_H})=800(1-\frac{300}{400})=800\times \left(0.25\right)=200J$
Option B.