Find the equivalent thermal resistance of combination of rods as shown – McqOptions

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1.	Find the equivalent thermal resistance of combination of rods as shown in figure. Every rod has same length I and cross-sectional area A. Thermal conductivities are mentioned in figure.
A.	\[\frac{1}{4KA}\]
B.	\[\frac{7l}{4KA}\]
C.	\[\frac{7l}{12KA}\]
D.	\[\frac{l}{12KA}\]
Answer» D. \[\frac{l}{12KA}\]

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