Question

Water rises to a height of $16.3cm$ in a capillary of height $18cm$ above the water level. If the tube is cut at a height of $12cm$

• A. Water will come as a fountain from the capillary tube
• B. Water will stay at a height of $12cm$ in the capillary tube
• C. The height of the water in the capillary will be $10.3cm$
• D. Work will flow down the sides of the capillary tube

Answer 1

The correct option is B Water will stay at a height of $12cm$ in the capillary tube

Capillary rise occurs due to the adhesion of water to the walls of the tiny tube which is dipped into it. The parameter that determine the amount of capillary rise are primarly the properties of the two surfaces. Namely the liquid and the tube.

It is tube that pulls the fluidup. Here, the maximum height upto which the fluid can rise in $16.3$cm. If the height of the tube is only $12$cm. Water will be able to rise only upto $12$cm because. No tube means no adhesion pulling further upwards.