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Coefficient of viscosity doesn’t depend on temperature because it is a property of the fluid. True or False?

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in Physics – Class 11 by (74.2k points)
Coefficient of viscosity doesn’t depend on temperature because it is a property of the fluid. True or False?

(a) True

(b) False

The question was asked in class test.

This interesting question is from Fluids Mechanical Properties in portion Mechanical Properties of Fluids of Physics – Class 11

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Correct option is (b) False

For explanation I would say: Coefficient of viscosity is a constant of proportionality for the viscous force expression. Viscous force depends on the area of contact and the velocity gradient, and also on the temperature as more temperature of liquid will decrease friction between its layers hence we say that coefficient of viscosity depends on temperature.

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