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11th ICSE
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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 2r will be:

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Important Questions on Surface Tension

MEDIUM
11th ICSE
IMPORTANT
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, 75×10-4 N force due to the weight of the liquid. If the surface tension of water is 6×10-2Nm-1, the inner circumference of the capillary must be:
HARD
11th ICSE
IMPORTANT
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 αso 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)
MEDIUM
11th ICSE
IMPORTANT
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 :
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 31
A capillary tube A is dipped in water. Another identical tube B is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid column in the two tubes?
HARD
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 32

Water is filled up to a height h in a beaker of radius R as shown in the figure. The density of water is ρ, the surface tension of water is T and the atmospheric pressure is P0. Consider a vertical section ABCD of the water column through a diameter of the beaker. The force on the water on one side of this section by water on the other side of this section has magnitude :

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MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 33
Choose the wrong statement among the followings:
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 19 - Surface Tension>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 34

A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5×10-2 N (see figure). The length of the slider is 30 cm and its weight negligible The surface tension of the liquid film is:

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