HomeTestsSearchRankProfile
mediumMCQPhysicsPhysics
1 mark

Water rises to a height in a capillary tube. If the length of capillary tube above the surface of water is made less than , then:

  1. A
    Water does not rise at all
  2. B
    Water rises upto the tip of capillary tube and then starts overflowing like a fountain
  3. C
    Water rises upto the top of capillary tube and stays there without overflowing
  4. D
    Water rises upto a point a little below the top and stays there

Solution & Step-by-step Explanation

According to Jurin's law . If the tube length is reduced to , the water will rise to the top of the tube, but instead of overflowing, the radius of curvature of the meniscus () will increase to maintain the balance ().

Practice this question

Try it yourself before checking the explanation above.

Water rises to a height in a capillary tube. If the length of capillary tube above the surface of water is made less than , then:
A
Water does not rise at all
B
Water rises upto the tip of capillary tube and then starts overflowing like a fountain
C
Water rises upto the top of capillary tube and stays there without overflowing
D
Water rises upto a point a little below the top and stays there

Share This Question

fluid mechanicssurface tension

Related Questions

mediumMCQ

Consider a water tank as shown in the figure. It has one wall at x = L and is very wide in the z direction. When filled with a liquid of surface tension S and density ρ , the liquid surface makes an angle θ_0 ( θ_0 1 ) with the x -axis at x = L . If y(x) is the height of the surface, then the equation for y(x) is:(Take θ(x) ≈ θ(x) ≈ θ(x) = dy/dx and g as acceleration due to gravity) ![image](https://pub-7faa453bd1ec4bf0a04cc031c6f058de.r2.dev/images/e48999a7-2b29-4d5c-be16-ae2fd5fbcea5.png)

mediumMCQ

A microscope has an objective of focal length 2 cm , eyepiece of focal length 4 cm and the tube length of 40 cm . If the distance of distinct vision of eye is 25 cm , the magnification in the microscope is:

mediumMCQ

An electron (mass 9 × 10^-31 kg and charge 1.6 × 10^-19 C ) moving with speed c/100 ( c = speed of light) is injected into a magnetic field B of magnitude 9 × 10^-4 T perpendicular to its direction of motion. We wish to apply a uniform electric field E together with the magnetic field so that the electron does not deflect from its path. Then (speed of light c = 3 × 10^8 ms^-1 ):

mediumMCQ

There are two inclined surfaces of equal length ( L ) and same angle of inclination 45^ with the horizontal. One of them is rough and the other is perfectly smooth. A given body takes 2 times as much time to slide down on rough surface than on the smooth surface. The coefficient of kinetic friction ( μ_k ) between the object and the rough surface is close to:

mediumMCQ

The kinetic energies of two similar cars A and B are 100 J and 225 J respectively. On applying breaks, car A stops after 1000 m and car B stops after 1500 m . If F_A and F_B are the forces applied by the breaks on cars A and B, respectively, then the ratio F_A/F_B is:

mediumMCQ

The current passing through the battery in the given circuit is: ![image](https://pub-7faa453bd1ec4bf0a04cc031c6f058de.r2.dev/images/5a163a0c-22d0-4a96-bcd2-b569518db0a4.png)

Ready for a Full Test?

Practice with timed mock tests and track your performance across Physics.

Browse TestsLeaderboard

Discussion