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The coefficient of viscosity eta of a li...

The coefficient of viscosity `eta` of a liquid can be defined from the equation

A

`F = eta u (d A)/(d x)`

B

`F = eta A (du)/(dx)`

C

`F = eta A (dx)/(du)`

D

`F = eta u (dx)/(dA)`

Text Solution

Verified by Experts

The correct Answer is:
B
`F = eta A (du)/(dx)`
where `F` is the tangential force between any two adjacent layers of a liquid of area of contact `A , dx` is the distance between the layers, and `du` is the difference in their velocities. Viscosity coefficient is the tangetial force when velocity gradient is unity and the area of constant is unit area.
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