If R1 and R2 are the inner and outer radii of a cylinder, the heat conduction through a cylinder is proportional to

\(\frac{1}{{\left( {{R_1} - {R_2}} \right)}}\)

\(\frac{1}{{{{\log }_e}\left\{ {\frac{{{R_1}}}{{{R_2}}}} \right\}}}\)

If R1 and R2 are the inner and outer radii of a cylinder, the heat con

1.	If R1 and R2 are the inner and outer radii of a cylinder, the heat conduction through a cylinder is proportional to
A.	(R1 – R2)
B.	(R1 × R2)
C.	\(\frac{1}{{\left( {{R_1} - {R_2}} \right)}}\)
D.	\(\frac{1}{{{{\log }_e}\left\{ {\frac{{{R_1}}}{{{R_2}}}} \right\}}}\)
Answer» E.

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If R1 and R2 are the inner and outer radii of a cylinder, the heat conduction through a cylinder is proportional to

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