A uniform capillary tube of inner radius is dipped vertically into a beaker filled…
PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids
Problem
A uniform capillary tube of inner radius r is dipped vertically into a beaker filled with water. The water rises to a height h in the capillary tube above the water surface in the beaker. The surface tension of water is σ. Ignore the mass of water in the meniscus. Find the angle of contact between water and the wall of the capillary tube.
[Adv. 2018]
(1) For a given material of the capillary tube, h decreases with increase in r
(2) For a given material of the capillary tube, h is independent of σ
(3) If this experiment is performed in a lift going up with a constant acceleration, then h decreases
(4) h is proportional to contact angle θ