The SI unit of viscosity is

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$N m^{- 2} s^{- 1}$

$N m^{- 1} s^{- 2}$

$N m^{- 2} s$

$N m^{- 1} s$

answer is B.

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Detailed Solution

The SI unit of viscosity is $N m^{- 2} s$ .

The measure of a fluid's coefficient of viscosity is how much it resists flowing when a force is applied. It is referred to as the shearing stress to velocity gradient ratio. It is a $Ns m^{- 2}$ unit.

Hence, the option B is correct.

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