1.

In the steady state of conduction of rod AB of length 100 cm, the temperature at the ends A is 80^(@)C and at B the temperature is 0^(@)C. The temperature of the rod at the distance 60 cm from A is :

Answer»

`16^(@)C`
`32^(@)C`
`48^(@)C`
None of the above

Solution :Here temperature GRADIENT `(80-0)/(100)=0.8^(@)"C/CM"`.
Decrease in temperature for 60 cm length `=60xx0.8`
`=48^(@)C`.
`:.` Temp. at 60 cm from point `A=80^(@)C-48^(@)C=32^(@)C`.
Thus correct choice is (B).


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