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Water flows in a streamline manner throu...

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 difference is increased to 2P, then find the rate of flow.

A

`4Q`

B

`Q`

C

`(Q)/(4)`

D

`(Q)/(8)`

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The correct Answer is:
D
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