Capillary rise || Contact angle

A vertical capillary is brought in contact with the water surface (surface tension = T). The radius of the capillary is r and the contact angle theta = 0^(@) . The increase in potential energy of the water (density =rho ) is

If a liquid does not rise or fall in a capillary tube , then its angle of contact is

Water rises in a capillary upto a height h . If now this capillary is tilted by an angle of 45^(@) then the length of the water column in the capillary becomes-

Excess pressure example||Contact angle||capillary action (1st method)

Excess pressure example||Contact angle||Cohesive and adhesive pressure||Shape OF liquid surface||Capillary action

Excess pressure example||Contact angle||Cohesive and Adhesive pressure||Shape OF liquid surface||Capillary action

A capillary tube of length (i) l = 60 cm , (ii) l = 50 cm and radius r = 1//4 mm is immersed vertically into water. Find the capillary rise in both cases. Angle of contact = 0^@ . Take coefficient of surface tension as 72 "dyne"//cm, g = 1000 cm s^(-12) .

A liquid rises in a capillary tube when the angle of contact is:

For liquid to rise in a capillary tube , the angle of contact should be