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A capillary tube of internal radius 2...

A capillary tube of internal radius ` 2 xx 10^(-3)` m immersed vertically in beaker containing a liquid rising in the capillary tube is ` 9 xx 10^(5)` kg , the surface tension of the liquid is

A

70 N/m

B

7 N/m

C

`0.7` N/m

D

`0.07`N/m

Text Solution

Verified by Experts

The correct Answer is:
D
`mg = 2pi rT :. T = (mg)/(2pir)`
` = (9xx10^(-5)xx10)/(2xx3.14 xx2xx10^(-3)) = 0.07` N/m
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