A) \[{{\text{r}}^{\text{5}}}\]
B) \[{{\text{r}}^{\text{2}}}\]
C) \[{{\text{r}}^{\text{3}}}\]
D) \[{{\text{r}}^{\text{4}}}\]
Correct Answer: A
Solution :
Power \[\text{=6}\pi \eta r{{V}_{T}}\cdot {{V}_{T}}=6\pi \eta rV_{T}^{2}\] \[{{V}_{T}}\propto {{r}^{2}}\] \[\Rightarrow \,\,\text{Power }\propto {{\text{r}}^{5}}\]
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