JEE Main 2022 · 26 Jun · Shift 2 · Physics Q55

← JEE Main 2022 · 26 Jun · Shift 2

PhysicsInteger+4 / -1Question 55 of 90

A heat engine operates with the cold reservoir at temperature 324 K. The minimum temperature of the hot reservoir, if the heat engine takes 300 J heat from the hot reservoir and delivers 180 J heat to the cold reservoir per cycle, is ______ K.

Your answer

Answer and worked solution

Official answer: 540

Efficiency $1-\frac{180}{300}=0.4$ cannot exceed Carnot: $1-\dfrac{324}{T}\ge0.4$ , so $T\ge540$ K.

Answer: 540

Topics:Carnot cycle Heat engines and refrigerators

← Previous question Next question →

JEE Main 2022 · 26 Jun · Shift 2, Physics question 55