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When a capillary tube is immersed in eth...

When a capillary tube is immersed in ethyl alcohol whose surface tension is 20 dyne `cm^(-1)`, the liquid rises to a height of 10 cm. Density of the liquid is 0.8 `gmcm^(-3)`. If `g=10ms^(-2)`, the radius of the capillary tube is …mm. (angle of contact of ethyl alcohol w.r.t. glass is `60^(@)`).

A

0.0025

B

0.025

C

0.25

D

2.5

Text Solution

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The correct Answer is:
2
`r=(2costhetaT)/(rdg)`
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