Discussion
What is unit of Viscosity ?
Answer: B
Viscosity is measured in newton second per square metre.
From Newton's law of viscous flow, \[F = \eta A \frac{dv}{dx} \Rightarrow \eta = \frac{F}{A\,(dv/dx)}\] which gives \(\mathrm{N\,s\,m^{-2}}\), also written as the pascal second. The CGS unit is the poise, and \(1\ \mathrm{Pa\,s} = 10\ \mathrm{poise}\).
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