What is the heat flow for steady state conduction for sphere?

1.	What is the heat flow for steady state conduction for sphere?
A.	4 Q <sub>R </sub>+ Q <sub>G </sub>= Q <sub>R + d R</sub>
B.	3 Q <sub>R </sub>+ Q <sub>G </sub>= Q <sub>R + d R</sub>
C.	2 Q <sub>R </sub>+ Q <sub>G </sub>= Q <sub>R + d R</sub>
D.	Q <sub>R </sub>+ Q <sub>G </sub>= Q <sub>R + d R</sub>
Answer» E.

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What is the heat flow for steady state conduction for sphere?

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