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

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

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Correct answer: D. dQ dt = KA ( T ₁- T ₂ ) L

For a rod of length L and area of cross-section A whose faces are maintained at temperature T ₁ and T ₂ respectively. Then in steady state the rate of heat flowing from one face to the other face in time t is given by dQ dt = KA ( T ₁- T ₂ ) L The curved surface of rod is kept insulated from surrounding to avoid leakage of heat.

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

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