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NEET2009PhysicsThermal Properties of MatterActual

The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures T₁ and T₂ (T₁>T₂ ) . The rate of heat transfer, dQ dt , through the rod in a steady state is given by :

Options

  1. AdQ dt = kA ( T ₁- T ₂ ) L
  2. BdQ dt = kL ( T ₁- T ₂ ) A
  3. CdQ dt = k ( T ₁- T ₂ ) LA
  4. DdQ dt = kLA ( T ₁- T ₂ )

Correct answer

A. dQ dt = kA ( T ₁- T ₂ ) L

Step-by-step solution

For steady state dQ dt = kA ( T ₁- T ₂ ) L

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