Question

Derive an expression for height of liquid column when a capillary is vertically dipped in a liquid​

Answer 1

Answer:

Surface tension is the contact force per unit length along the circumference of top surface. This force pulls the liquid vertically upwards. => h = 4 S CosФ / (ρ D g) ans.

Answer 2

QUESTION:-

Derive an expression for height of liquid column when a capillary is vertically dipped in a liquid

ANSWER:-

• A tube of very fine drag is called a capillary.
• The phenomenon of the increase or decline of a liquid in a capillary tube is called capillarity.
• When we assume the meniscus to be hemispherical then the weight of the liquid increase which means the total upward force is equal to the Volume of liquid in the cylinder up to h + volume of liquid in the cylinder of radius r and height r-volume of a hemisphere of radius rpg

$2\pi \times rT \times cos0= [\pi {r}^{2}h + \pi{r}^{2}r - \frac{2}{3} \times {r}^{3} ]\times pg \\T = \frac{(r(h + \frac{r}{3} ) \times pg)}{(2tcos0)}\\ h = \frac{(2T \times cos0)}{rpg}$

This formula is called the Ascent formula.

#SPJ2