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The SI unit of viscosity coefficient is...

The `SI` unit of viscosity coefficient is

A

`N s m^(-2)`

B

`Pa s`

C

`kg m^(-1) s^(-1)`

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
The `SI` unit of viscosity coefficient is 1 newton second per square meter `(N s m^(-2)) = "pascal second" (Pa s = 1 kg m^(-1) s^(-1))`.
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The coefficient of viscosity n of a fluid moving steadily between two surfaces is given by the formula, f = nA(dV)/(dx) where f is the frictional force on the fluid, A is an area in the fluid and dV//dx is the velocity gradient inside the fluid at that area. The SI unit of viscosity coefficient n is given as.

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