First slide

Heat engine

Question

In a Carnot engine, when T₂ = 0⁰C and T₁ = + 200⁰C its efficiency is $η_{1}$ and when T₁ = 0⁰C and T₂ = 200⁰C, Its efficiency is $η_{2},$ then what is $η_{1} / η_{2}$

Moderate

A

0.577
B

0.733
C

0.638
D

Cannot be calculated

Solution

$η = 1 - \frac{T_{2}}{T_{1}} = \frac{T_{1} - T_{2}}{T_{1}} \Rightarrow η_{1}$
$= \frac{(473 - 273)}{473} = \frac{200}{473}$
$and η_{2} = \frac{273 - 73}{273} = \frac{200}{273}$
So required ratio $\frac{η_{1}}{η_{2}} = \frac{273}{473} = 0.577$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App