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Two rods A and B of different materials ...

Two rods `A` and `B` of different materials are welded together as shown in figure. Their thermal conductivities are `K_(1)` and `K_(2)`. The thermal conductivity of the composite rod will be

A

`(K_(1)+K_(2))/2`

B

`(3(K_(1)+K_(2)))/2`

C

`K_(1)+K_(2)`

D

`2(K_(1)+K_(2))`

Text Solution

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The correct Answer is:
A
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