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Three conducting rods AB, BC and BO made...

Three conducting rods AB, BC and BO made of same material and same cross section are arranged as shown in the figure. Temperatures at the points A, O and C are maintained at `20^(0)C, 90^(0)`C and `0^(0)`C respectively. The ratio of lengths of BO to BC when there is no beat flow in AB, is

A

`(2)/(9)`

B

`(7)/(2)`

C

`(2)/(7)`

D

`(9)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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