NEET Physics MCQs

A capillary tube of radius $r$ is immersed in a liquid, and the liquid rises in it to a height $h$. The mass of the liquid in the capillary is $2g$. Another capillary tube of radius $r/2$ is immersed in the same liquid. The mass of liquid that will rise in this tube is:

Two capillary tubes of radii $r$ and $2r$ are immersed in water. The mass of water rising in the first tube is $m$. The ratio of the masses of water rising in the two tubes is:

A capillary tube of radius $r$ is immersed in water. The mass of water rising in the tube is $m$. If a tube of radius $4r$ is immersed in a liquid with twice the surface tension and half the density of water, the mass of liquid rising in this tube, assuming the contact angle remains the same, is:

A capillary tube of radius $r$ is immersed in water. The water rises to a height $h$, and the mass of water in the tube is $m$. Which of the following expressions correctly represents the mass of water that would rise in a tube of radius $2r$ immersed in the same water?

A soap bubble, having a radius of 2 mm, is blown from a detergent solution having a surface tension of $2.5 imes 10^{-2} \, N/m$. The pressure inside the bubble equals the pressure at a point $Z_0$ below the free surface of water in a container. Taking $g = 10 \, m/s^2$ and the density of water $= 10^3 \, kg/m^3$, the value of $Z_0$ is:

A soap bubble is blown from a detergent solution having a surface tension of $5 imes 10^{-2} \, N/m$. If the pressure inside the bubble is equal to the pressure at a depth of 1 cm below the free surface of oil (density $800 \, kg/m^3$), what is the radius of the bubble? (Take $g = 10 \, m/s^2$)

A soap bubble of radius 0.5 mm is formed from a solution with surface tension $2.5 imes 10^{-2} N/m$. What is the excess pressure inside the bubble?

Two soap bubbles have radii $R_1$ and $R_2$ and surface tension $T$. If the excess pressure inside the bubbles are equal, what is the relationship between $R_1$ and $R_2$?

A soap bubble with a radius of 4 mm is formed from a solution. If the excess pressure inside the bubble is 25 Pa, what is the surface tension of the solution?

If a soap bubble expands, the pressure inside the bubble: