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Physics
Problem
For a plane slab of thickness
L
L
L
, cross-sectional area
A
A
A
and thermal conductivity
k
k
k
, which of the following gives its thermal resistance
R
R
R
? a)
k
A
L
\dfrac{kA}{L}
L
k
A
b)
L
k
A
\dfrac{Lk}{A}
A
L
k
c)
2
L
k
A
2\dfrac{L}{kA}
2
k
A
L
d)
L
k
A
\dfrac{L}{kA}
k
A
L
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