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Q.

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 a/2 and the pressure is increased to 2P, then the rate of flow becomes:

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a

4Q

b

Q/2

c

Q

d

Q/8

answer is D.

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Detailed Solution

V=πPr48ηl Q=πPa48ηl---(1) V2=π2Pa248ηl=Q8 from (1)
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