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A uniform slab of dimension 10cmxx10cmxx...

A uniform slab of dimension `10cmxx10cmxx1cm` is kept between two heat reservoir at temperatures `10^(@)C` and `90^(@)C` The larger surface areas touch the reservoirs. The thermal conductivity of the material is `0.80Wm^(-1).^(@)C^(-1)` . Find the amount of heat flowing through the slab per minute.

Text Solution

Verified by Experts

The correct Answer is:
`64 J`
`A = 100 cm^(2)`
`i_(H) = (90 -10)/((1xx10^(-2))) xx (0.8) (100 xx 10^(-4))`
`l = 1cm`
`(dq)/(dt) = i_(H) = 80 xx 0.8 = 64 J//s`
`Q = 64 xx 1 = 64 J`
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Knowledge Check

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