Which one of the following is the SI unit of the thermal conductivity of a material?
A
Wm−1K−1
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B
Wm/K
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C
Wm−1/K−1
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D
Js−1m−1K
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Solution
The correct option is AWm−1K−1 Thermal conductivity is a measure of the ability of a material to transfer heat. Its SI unit is watts per meter-kelvin (Wm−1K−1).