Water flows in a streamline manner through a capillary tube of radius a. The pressure difference being P and the rate of flow is Q. If the radius is reduced to 
and the pressure is increased to 2P then the rate of flow becomes
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Formula for rate of flow of liquid through a tube of radius 
(Poiseuille's relation) is 
For a tube of radius a and Pressure P, rate of flow Q is given as 
, if radius of tube is 
and pressure 2 P, then 
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