ISRO Mechanical & Aerospace 2011 - Question 16

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According to Fourier's law, amount of heat flow (Q) through the body in unit time is equal to

  • A. $kA \frac{dT}{dx}$
  • B. $kA \frac{dT²}{dx²}$
  • C. $k \frac{dT}{dx}$
  • D. $kA \frac{dx}{dT}$

Answer: A. $kA \frac{dT}{dx}$

Explanation: Fourier's Law of Conduction: $Q = -kA \frac{dT}{dx}$.

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