Heat transfer rate described by Fourier's law will decrease, if the _____________ increases?
Correct answer: B. Thickness
- A. Thermal conductivity
- B. Thickness
- C. Temperature difference
- D. Heat transfer area
Explanation
Fourier's law gives heat-transfer rate as proportional to area, thermal conductivity, and temperature difference, but inversely proportional to wall thickness. Increasing thickness therefore decreases the rate.
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