NEET Questions

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:

Consider two identical airplanes, one flying at a low altitude where the air density is high, and the other at a high altitude where the air density is low. Both are flying at the same speed. Which requires a greater angle of attack to maintain level flight?

Pressure at a point inside a fluid depends on:

The pressure at the bottom of a tank filled with a liquid depends on:

A U-tube contains water and oil. The height of the water column is 10 cm, and the height of the oil column is 12 cm. If the density of water is $1000 \, kg/m^3$, what is the density of the oil? (Assume $g = 10 \, m/s^2$)

Two liquids of different densities are poured into a U-tube. Which liquid will rise higher in the tube?

A body experiences an upthrust of 20 N when fully immersed in water. If it is now fully immersed in a liquid with twice the density of water, what will be the new upthrust?

A solid cube of side 10 cm and density 0.6 g/cm$^3$ is floating in a liquid of density 1.2 g/cm$^3$. What is the height of the cube above the liquid surface?

Two identical containers are filled to the same height, one with water and the other with mercury. Which container experiences a greater pressure at the bottom?