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)]`

Options

A. `+2000N//m^(2)`
B. `-2000N//m^(2)`
C. `(10^(5)-1000)(N)/(m^(2))`
D. `(10^(5)-2000)(N)/(m^(2))`

Answer

B

Explanation

`P=P_("liquid surface")-rhogh`
`=0-rhogh=-2000N//m^(2)`