A fin length l, protrudes from a surface held at temperature T0; it be – McqOptions

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1.	A fin length l, protrudes from a surface held at temperature T₀; it being higher than the ambient temperature T_a. The heat dissipation from the free end of the fin is stated to be negligibly small. What is the temperature gradient (dT/dx)_x=l at the tip of the fin?
A.	Zero
B.	(T<sub>0</sub>-T<sub>l</sub>)/l
C.	h(T<sub>0</sub>-T<sub>a</sub>)
D.	(T<sub>l</sub>-T<sub>a</sub>)/(T<sub>0</sub>-T<sub>a</sub>)
Answer» B. (T<sub>0</sub>-T<sub>l</sub>)/l

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