A) \[[M{{L}^{-1}}{{T}^{-1}}]\]
B) \[[ML{{T}^{-1}}]\]
C) \[[M{{L}^{-1}}{{T}^{-2}}]\]
D) \[[M{{L}^{-2}}{{T}^{-2}}]\]
Correct Answer: A
Solution :
[a] From stokes law \[F=6\pi \eta rv\Rightarrow \eta =\frac{F}{6\pi rv}\] \[\therefore \,\,\eta =\frac{ML{{T}^{-2}}}{[L][L{{T}^{-1}}]}\Rightarrow \eta =[M{{L}^{-1}}{{T}^{-1}}]\]
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