Q.

The coefficient of viscosity  of a liquid can be defined from the equation F=ηA(dv/dx)where F is the tangential force  between two liquid layers of area A. The layers are at a distance dy apart and du is the difference in their velocities. Suitable unit for dv/dx is:

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a

m s-1

b

s-1

c

Nm-2

d

N-1m2

answer is B.

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Detailed Solution

dvdx=velocitydistance=ms-1m=s-1
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The coefficient of viscosity  of a liquid can be defined from the equation F=ηA(dv/dx)where F is the tangential force  between two liquid layers of area A. The layers are at a distance dy apart and du is the difference in their velocities. Suitable unit for dv/dx is: