Identify the correct figure which shows the relation between the height of water column in a capillary tube…
Identify the correct figure which shows the relation between the height of water column in a capillary tube and the capillary radius.
(ii)
(iv)
(i)
(iii)
Solution
Height if liquid in capillary tube is given by,
$\begin{aligned}
& h=\frac{2 T \cos \theta}{r \rho g} \\
\therefore \quad & h \propto \frac{1}{r}
\end{aligned}$ This is correctly depicted by graph (ii).
