Question

Figure shows a capillary tube of radius $r$ dipped into water. The atmospheric pressure is $P_0$ and the capillary rise of water is $h$. $s$ is the surface tension for water-glass.


Which of the following graphs may represent the relation between the capillary rise $h$ and the radius $r$ of the capillary?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

$h=\frac{2T\cos \theta }{\rho gr}$
$h\propto \frac{1}{r}$
For this case the best fitted graph is option C