For steady flow of heat along a rod, the general equation is d²α/dx²

Question

For steady flow of heat along a rod, the general equation is
d²α/dx² – m² α = 0
The value of constant m is

Options:

A . (h P/k A C)

B . (h P/k A C)^3/2

C . (h P/k A C)^1/2

D . (h P/k A C)^2

Answer: Option C
Answer: (c).(h P/k A C)^1/2

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