A slab of material has area A, thickness L, and thermal conducitivy k. One of its surface (P ) is maintained at temperature T_(1) and the other surface (Q ) is maintained at a lower temperature T_(2). The rate of heat flow from P to Q is :

A slab of material has area A, thickness L, and thermal conducitivy k.

1.	A slab of material has area A, thickness L, and thermal conducitivy k. One of its surface (P ) is maintained at temperature T_(1) and the other surface (Q ) is maintained at a lower temperature T_(2). The rate of heat flow from P to Q is :
Answer» `(kA( T_(1) - T_(2)))/(L^(2))` `(KL(T_(1)-T_(2)))/(A)` `(kL(T_(1)-T_(2)))/(L)` `(k(T_(1)-T_(2)))/((LA))` ANSWER :C

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A slab of material has area A, thickness L, and thermal conducitivy k. One of its surface (P ) is maintained at temperature T_(1) and the other surface (Q ) is maintained at a lower temperature T_(2). The rate of heat flow from P to Q is :

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