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A capillary tube of uniform bore is dipp...

A capillary tube of uniform bore is dipped vertically in water which rises by 7 cm in tube . Then the radius of capillary tube is (S.T of water is 70 dyne/cm , g = 1000 `"cm/s"^(2) theta = 0^(@)) `

A

`0.2 ` mm

B

2 mm

C

`0.2` cm

D

2 cm

Text Solution

Verified by Experts

The correct Answer is:
A
` r = (2Tcos theta )/(h rho g) = (2xx70xx1)/(7xx10^(3)xx1) = 0.2 ` mm
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