MHT CET · Physics · Mechanical Properties of Fluids
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.
- A on the surface of moon
- B at the north pole
- C in a lift moving up with an acceleration
- D on the equator
Answer & Solution
Correct Answer
(A) on the surface of moon
Step-by-step Solution
Detailed explanation
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)
\(
\begin{aligned}
& \mathrm{h}=\frac{2 \mathrm{~T} \cos \theta}{\mathrm{r} \rho \mathrm{g}} \\
& \therefore \mathrm{h} \propto \frac{1}{\mathrm{~g}}
\end{aligned}
\)
Smaller the value of \(g\). greater will be h. Out of the given options, value \(g\) will be minimum for option (A)
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