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JEE Main 202116 MarchEvening Shift

Exam: JEE Main
Year: 2021
Date: 16 March
Shift: Evening Shift
Subject: Physics
Chapter: Thermodynamics

JEE Main 2021 · 16 March · Evening Shift · Physics · Thermodynamics

For an ideal heat engine, the temperature of the source is 127 ° C...

For an ideal heat engine, the temperature of the source is

127 ° C

. In order to have

60 %

efficiency the temperature of the sink should be __________

C ∘

. (Round off to the nearest integer)

Correct answer

0

Step-by-step solution

$n = 0 . 60 = 1 - \dfrac{{T}_{L}}{{T}_{H}}$

$\dfrac{{T}_{L}}{{T}_{H}} = 0 . 4 ⇒ {T}_{L} = 0 . 4 \times 400$

$= 160K$

$= - 113 ° C$

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