JEE Main 2022 · 24 Jun · Shift 2 · Physics Q35

PhysicsSingle correct+4 / -1Question 35 of 90

A Carnot engine takes 5000 kcal of heat from a reservoir at 727°C and gives heat to a sink at 127°C. The work done by the engine is

3\times10^6

Zero

12.6\times10^6

8.4\times10^6

Answer and worked solution

Official answer: C

Efficiency. $\eta=1-\dfrac{400}{1000}=0.6$ .

Work. $W=0.6\times5000$ kcal $=3000$ kcal $=3000\times4200$ J $=12.6\times10^6$ J.

(C)

Topics:Carnot cycle

JEE Main 2022 · 24 Jun · Shift 2, Physics question 35