Physics · Heat Conduction and Fourier's Law
A plane wall of thickness L and thermal conductivity k has a steady heat flow through it. If the temperature drop across the wall is ΔT, what is the expression for heat flux q (rate of heat conduction per unit area)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1q = k ΔTL✓
- 2q = ΔTkL
- 3q = kL × ΔT
- 4q = kLΔT
Correct answer
q = k ΔTL
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