Two capillary tubes of radii 0.2 mm and 0.4 mm are dipped vertically in water. The difference in the heights of the water level in the two tubes is $h_1$. If the two tubes are dipped in a liquid of surface tension $\frac{2}{3}$ that of water and density twice that of water, the difference in height of the liquid in the two tubes is $h_2$. The ratio $\frac{h_1}{h_2}$ is:

Two capillary tubes of same diameter are dipped in two liquids A and B having densities $\rho_A$ and $\rho_B$ ($\rho_A > \rho_B$) and surface tensions $T_A$ and $T_B$ ($T_A < T_B$) respectively. If the angles of contact are same, then:

A liquid rises to a height $h$ in a capillary tube of radius $r$. If another capillary tube with radius $2r$ is used with the same liquid, and the tube's length above the liquid surface is less than the expected rise height, what will be observed?

The rise of liquid in a capillary tube of radius $r$ is $h$ due to surface tension. If diameter of the tube is reduced to half, then rise of level in the tube will be

Which of the following is responsible for the spherical shape of a small drop of liquid?

Water rises to a height $h$ in a capillary tube of cross sectional area $A$. The height to which water will rise in a capillary tube of cross sectional area $4A$ will be

A water film is formed between two parallel wires of 10 cm length. The distance of 0.5 cm between the wires is increased by 1 mm. Which will be the work done? (Surface tension of water =  $72{\rm{N}}{{\rm{m}}^{ - 1}})$

When two soap bubbles of radius ${r_1}$ and {r_2}({r_2} &gt; {r_1}) coalesce, the radius of curvature of common surface is

A mercury drop of radius 1 cm is broken into ${10^6}$ droplets of equal size. The work done is $\left( {S = 35 imes {{10}^{ - 2}}{\rm{N}}{{\rm{m}}^{ - 1}}} \right)$

The change in surface energy when a drop of radius R splits into 8 droplets, each of radius r is (surface tension is T)

A water film is made between two straight parallel wires of length 10 cm separated by 5 mm from each other. If the distance between the wires is increased by 2 mm. How much work will be done? Surface tension for water is $72{\rm{dyne c}}{{\rm{m}}^{ - 1}}$