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The arrangement as shown, temperatures o...

The arrangement as shown, temperatures of end P and R are `200^(@) C` and `0^(@) C`. The length of rods are shown. The length of rod RS is IL, if no heat flows through QS where I is an integer. Find the value of I.

Text Solution

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The correct Answer is:
6
If bridge is balanced, no heat flows through QS.
`(R_(PQ))/(R_(QR)) = (R_(PS))/(R_(RS))`
`(L)/(3L) = (2L)/(x) " Since " R prop L`
`x = 6L = IL` (given)
`I = 6`
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