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Three rods A,B and C have the same dimen...

Three rods `A,B` and `C` have the same dimensions Their conductivities are `K_(A)` K and `K_(C)` respectively `A` and `B` are placed end to end with their free ends kept at certain temperature difference `C` is placed separately with its ends kept at same temperature difference The two arrangements conduct heat at the same rate `K_(c)` must be equal to .

A

`k_(A)+k_(B)`

B

`(k_(A)k_(B))/(k_(A)+k_(B))`

C

`1/2 (k_(A)+k_(B))`

D

`2((k_(A)k_(B))/(k_(A)+k_(B)))`

Text Solution

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The correct Answer is:
B
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