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Q.

A capilary tube is attached horizontally to a constant head arrangement. If the radius of the capilary tube is increased by 10% then the rate of flow of liquid will change nearly by

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a

+10%

b

+ 46%

c

– 10%

d

– 40%

answer is B.

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Detailed Solution

 2. η=πPr48ℓV;V∝r4; 

V= rate of flow 

ΔVV×100=46%

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