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A long glass cylinder has a small hole of radius $r$ in its bottom. The depth to which it can be dipped vertically in the water of surface tension $T$ and density $ρ$ without any water entering the cylinder:

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Important Questions on Surface Tension

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 23

A vessel whose bottom has holes of diameter

0.1 mm

is filled with water (density

= 10^{3} kg m^{- 3}

, surface tension

7.5 \times 10^{- 2} {Nm}^{- 1}

). The maximum height up to which water can be filled without leakage is

(g = 10 m s^{- 2})

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 24

Due to capillary action, a liquid will rise in a narrow tube if the angle of contact is :

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 25

A capillary tube is dipped vertically in a liquid. The meniscus of liquid in the capillary is in level with the liquid outside. The angle of contact is :

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 26

Water rises in a capillary tube to a height of

4 cm

. If the area of cross-section of the tube is reduced to one-fourth, then up to what height will the water rise?

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 27

Water rises in a capillary tube of radius

r

up to a height

h

. The mass of water in the capillary tube is

m

. The mass of water that will rise in a capillary tube of radius

2 r

will be:

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 28

Water rises in a capillary, tube to a certain height such that the upward force due to surface tension is balanced by,

75 \times 10^{- 4} N

force due to the weight of the liquid. If the surface tension of water is

6 \times 10^{- 2} {Nm}^{- 1}

, the inner circumference of the capillary must be:

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 29

A glass capillary tube is of the shape of a truncated cone with an apex angle

α

so that its two ends have cross-sections of different radii. When dipped in water vertically, water rises in it to a height

h

, where the radius of its cross-section is

b

. If the surface tension of water is

T

, its density is

ρ

, and its contact angle with glass is

0

, the value of

h

will be : (

g

is the acceleration due to gravity)

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ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 30

In a

20 cm

long capillary tube, water rises up to a height of

10 cm

. If the system is placed in an artificial satellite revolving around earth, water will rise in it up to a height of :

A long glass cylinder has a small hole of radius r in its bottom. The depth to which it can be dipped vertically in the water of surface tension T and density ρ without any water entering the cylinder:

Important Questions on Surface Tension

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A long glass cylinder has a small hole of radius $r$ in its bottom. The depth to which it can be dipped vertically in the water of surface tension $T$ and density $ρ$ without any water entering the cylinder: