First slide

Conduction

Question

The quantity of heat which crosses-unit area of a metal plate during conduction depends upon:

Moderate

A

the density of the metal
B

the temperature gradient perpendicular to the area
C

the temperature to which the metal is heated
D

the area of the metal plate

Solution

$\frac{Q}{t A} = \frac{k (θ_{1} - θ_{2})}{x} = \frac{k d θ}{d x}$
$\frac{Q}{t A} α \frac{d θ}{d x}$

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