First slide

Viscous flow/Laminar flow

Question

In Poiseuilli's method of determination of coefficient of viscosity, the physical quantity that requires greater accuracy in measurement is

Easy

A

Pressure difference
B

Volume of the liquid collected
C

Length of the capillary tube
D

Inner radius of the capillary tube

Solution

As Poiseuilli's equation contains $r^{4}$ in it, radius of tube should be known more accurately.

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