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Five rods of same dimensions are arrange...

Five rods of same dimensions are arranged as shown in figyre. They have thermal conductivities `K_(1), K_(2), K_(3), K_(4) and K_(5)`. When points A and B are maintained at different temperatures, no heat flows through the central rod if

A

`K_(1)=K_(4) and K_(2)=K_(3)`

B

`K_(1)K_(4)=K_(2)K_(3)`

C

`K_(1)K_(2)=K_(3)K_(4)`

D

`(K_(1))/(K_(4))=(K_(2))/(K_(3))`

Text Solution

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The correct Answer is:
B
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