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Let us catch up right from the basics
Heat in joule with dimension M L^2 T^-2 passing through a conductor is directly proportional to
a) area of cross section [L^2]
b) time [T]
c) temperature gradient [KL^-1]
So we can write using a constant K
Hence H = K * [(@2 -@1) / L ]* A * t
So dimensions for K will be M L T^-3 K^-1
Wiki User
∙ 10y ago
Wiki User
∙ 11y agothe rate at which heat is trasferred by conduction through a unit cress-sectional area of material when a temperature gradient exists perpendicular to the area.
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Does the value of thermal conductivity depend on the dimension of the specimen?
Thermal conductivity is an intensive property. It is inherent in the material but not dependent on the amount of material. This should not be confused with the rate of heat conduction which can depend on the dimensions of a material. There is one case where the thermal conductivity might depend on the dimension of the material - when the conductivity is not uniform with direction, i.e. where conductivity laterally is different from conductivity longitudinally. When the orientation of the material changes the conductivity, the dimensions can have an effect on the apparent bulk thermal conductivity.
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What is the thermal conductivity of a perfect conductor?
The thermal conductivity of a perfect conductor is 1
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Thermal conductors let heat move through them. Metals are part of this group.
Does the value of thermal conductivity depend on the dimension of the specimen?
Thermal conductivity is an intensive property. It is inherent in the material but not dependent on the amount of material. This should not be confused with the rate of heat conduction which can depend on the dimensions of a material. There is one case where the thermal conductivity might depend on the dimension of the material - when the conductivity is not uniform with direction, i.e. where conductivity laterally is different from conductivity longitudinally. When the orientation of the material changes the conductivity, the dimensions can have an effect on the apparent bulk thermal conductivity.
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What is thermal and electrical conductiuity?
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What is the thermal conductivity of a perfect conductor?
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