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Three conducting rods of same material a...

Three conducting rods of same material and cross-section are shown in figure. Temperatures of A,D and C are maintained at `20^(@)C, 90^(@)C and 0^(@)C`. The ratio of lengths BD and BC if there is no heat flow in AB is

A

`2//7`

B

`7//2`

C

`9//2`

D

`2//9`

Text Solution

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The correct Answer is:
B
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