First slide

Conduction

Question

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are $K_{1} a n d K_{2}$ .

The thermal conductivity of the composite rod will be

Easy

A

$\frac{3 (K_{1} + K_{2})}{2}$
B

$K_{1} + K_{2}$
C

$2 (K_{1} + K_{2})$
D

$\frac{K_{1} + K_{2}}{2}$

Solution

Equivalent thermal conductivity of the composite rod in parallel combination will be,
$K = \frac{K_{1} A_{1} + K_{2} A_{2}}{A_{1} + A_{2}} = \frac{K_{1} + K_{2}}{2}$

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