Water rises to a height $10 \mathrm{~cm}$ in a capillary tube. It will rise to a height which is much more…
Water rises to a height $10 \mathrm{~cm}$ in a capillary tube. It will rise to a height which is much more than $10 \mathrm{~cm}$ in a very long capillary tube if the apparatus is kept.
on the surface of moon
at the north pole
in a lift moving up with an acceleration
on the equator
Solution
Rise in a capillary tube is given by
$\begin{aligned}
& \mathrm{h}=\frac{2 \mathrm{~T} \cos \theta}{\mathrm{r} \rho \mathrm{g}} \\
& \therefore \mathrm{h} \propto \frac{1}{\mathrm{~g}}
\end{aligned}$
Smaller the value of $g$. greater will be h. Out of the given options, value $g$ will be minimum for option (A)
.