Which of these equations govern the problem of source-free one-dimensional steady-state heat conduction?

\(\frac{d}{dx}(k\frac{d\phi}{dx})\)

\(\frac{d}{dx}(k\frac{dT}{dx})\)

\(\frac{d}{dx}(k\frac{d\phi}{dx})\)

\(\frac{d}{dx}(\Gamma\frac{dT}{dx})\)

\(\frac{d}{dx}(\Gamma\frac{d\phi}{dx})\)

Which of these equations govern the problem of source-free one-dimens

1.	Which of these equations govern the problem of source-free one-dimensional steady-state heat conduction?
A.	\(\frac{d}{dx}(k\frac{dT}{dx})\)
B.	\(\frac{d}{dx}(k\frac{d\phi}{dx})\)
C.	\(\frac{d}{dx}(\Gamma\frac{dT}{dx})\)
D.	\(\frac{d}{dx}(\Gamma\frac{d\phi}{dx})\)
Answer» B. \(\frac{d}{dx}(k\frac{d\phi}{dx})\)