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A capillary tube of inner radius r=5mm i...


A capillary tube of inner radius r=5mm is covered in a container with a liquid whose vapour pressure is negligible. The density of liquid is `rho=1000kg//m^(3)`. The container and the tube are in vacuum condition. The pressure inside liquid in the capillary tube at a height h=20cm as shown in figure is `[g=10m//s^(2)]`

A

`+2000N//m^(2)`

B

`-2000N//m^(2)`

C

`(10^(5)-1000)(N)/(m^(2))`

D

`(10^(5)-2000)(N)/(m^(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
`P=P_("liquid surface")-rhogh`
`=0-rhogh=-2000N//m^(2)`
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