Question

Which one of the following represents the correct dimensions of the coefficient of viscosity? 

Options

• [ML^-1T^-1]

• [MLT^-1]

• [ML^-1T^-2]

• [ML^-2T^-2]

Answer 1

[ML^-1T^-1]

Explanation:

According to Stokes law,

F = 6πηrv ⇒ η = `"F"/(6pi"rv")`

η = `(["MLT"^-2])/(["L"]["LT"^-1])`

⇒ η = [ML^-1T^-1]