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Surface Tension

Water rises t...

Question

Water rises to a height of 6 cm in a capillary tube of radius 'r'. If the radius of the capillary tube is 3r, the height to which water will rise is(in cm.):

A

18

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B

9

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C

2

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D

3

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Solution

The correct option is C 2
$h \propto \frac{1}{r}$
$h_{1} r_{1} = h_{2} r_{2}$
$6. r = h_{2} \times 3 r$
$h_{2} = 2 c m$

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