Question

The correct curve between the height or depression $h$ of liquid in a capillary tube and its radius is

• A. $\text{Diagram}$
• B. $\text{Diagram}$
• C. $\text{Diagram}$
• D. $\text{Diagram}$

Answer 1

The correct option is C $\text{Diagram}$

In a capillary tube of radius $r,$ the rise or fall of the level is given by
$h=\frac{2T\cos \theta }{rdg}$
Where, $T=$ Surface tension,
$\theta =$ angle of contact,
$\rho =$ density of liquid,
$g=$ Acceleration due to gravity
$h\propto \frac{1}{r}$
So, the graph between $h$ and $r$ will be rectangular hyperbola.
Final answer: $\left(b\right)$