A) \[\frac{c}{{{r}^{3}}\rho }\]
B) \[\frac{1}{{{r}^{3}}\rho c}\]
C) \[3{{r}^{3}}\rho c\]
D) \[\frac{1}{r\rho c}\]
Correct Answer: D
Solution :
[d] \[\left[ \frac{-dT}{dr} \right]=\frac{A}{mc}\left[ T-{{T}_{0}} \right]=\frac{4\pi {{r}^{2}}}{\rho \times \frac{4}{3}\pi {{r}^{3}}c}\left[ T-{{T}_{0}} \right]\] \[\therefore \left[ \frac{-dT}{dr} \right]\propto \frac{1}{\rho rc}\]You need to login to perform this action.
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