Heat is transferred from a hot fluid to a cold one through a plane wall of thickness (δ), surface area (A) and thermal conductivity (k). The thermal resistance is

Heat is transferred from a hot fluid to a cold one through a plane wal

1.	Heat is transferred from a hot fluid to a cold one through a plane wall of thickness (δ), surface area (A) and thermal conductivity (k). The thermal resistance is
A.	1/A (1/h₁ + δ/k + 1/h₂)
B.	A (1/h₁ + δ/k + 1/h₂)
C.	1/A (h₁ + δ/k + h₂)
D.	A (1/h₁ + δ/k + 1/h₂)
Answer» B. A (1/h₁ + δ/k + 1/h₂)

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Heat is transferred from a hot fluid to a cold one through a plane wall of thickness (δ), surface area (A) and thermal conductivity (k). The thermal resistance is

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