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Two plates of equal areas are placed in ...

Two plates of equal areas are placed in contact with each other . Their thickness are `2.0 cm` and `5.0 cm` respectively. The temperature of the external surface of the first plate is `-20^(@)C` and that of the external surface of the second plate is `20^(@)C`. What will be the temperature of the contact surface if the plate(i) are of the same material, (ii)have thermal conductivities in the ratio `2:5`.

Text Solution

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The correct Answer is:
(i) `-8.57^(@)C` (ii)`0^(@)C`
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