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BITSAT2021PhysicsThermal Properties of MatterActual

The two ends of a rod of length L and a uniform crosssectional area A are kept at two temperatures T₁ and T ₂ ( ~T ₁> T ₂ ) . The rate of heat transfer, dQ dt through the rod in a steady state is given by:

Options

  1. Ak (T₁-T₂ ) L A
  2. Bk L A (T₁-T₂ )
  3. Ck A (T₁-T₂ ) L
  4. Dk L (T₁-T₂ ) A

Correct answer

C. k A (T₁-T₂ ) L

Step-by-step solution

dQ dt = kA ( T ₁- T ₂ ) L [ ( T ₁- T ₂ ) . is the temperature difference ]

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