First slide

Refrigerator

Question

An ideal heat engine has an efficiency $η$ . The coefficient of performance of the engine when driven backward will be

Moderate

A

1- $(\frac{1}{η})$
B

$η - (\frac{1}{η})$
C

$(\frac{1}{η}) - 1$
D

$(\frac{1}{1 - η})$

Solution

$η = 1 - \frac{T_{2}}{T_{1}}$
and $ω = \frac{T_{2}}{T_{1} - T_{2}} = \frac{\frac{T_{2}}{T_{1}}}{1 - (\frac{T_{2}}{T_{1}})} = \frac{(1 - η)}{η} = \frac{1}{η} - 1$

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