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Two bars of thermal conductivities K and...

Two bars of thermal conductivities `K` and `3K` and lengths `1 cm` and `2 cm` respectively have equal cross-sectional area, they are joined lengths wise as shown in the figure. If the temperature at the ends of this composite br is `0^(@)C` and `K^(2)//l` respectively (see figure), then the temperature `phi` of the interface is

A

`50^(@)C`

B

`(100)/(3).^(@)C`

C

`60^(@)C`

D

`(200)/(3).^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
C
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