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The ends of a metre stick are maintain a...

The ends of a metre stick are maintain at `100^(@)C` and `0^(@)C` . One end of a rod is maintained `25^(@)C` . Where should its other end be touched on the metre stick so that there is no heat current in the rod in steady state?

A

`25 cm` form the hot end

B

`40 cm` from the cold end

C

`25 cm` from the cold end

D

`60 cm` from the cold end

Text Solution

Verified by Experts

The correct Answer is:
C
`25 cm` from cold end is at `25^(@)C` (Since temperature gradient is `1^(@)C//cm)`
`:.` rod shound be touched at this point to ensure no heat transfter.
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