Height of capillary rise when radius, surface tension, density or tilt change
This type of question, asked 5 times: 2021 Paper 18, 30 Jan 2023, 7 Apr 2025, 21 Jan 2026 S2, 22 Jan 2026 S2. All 5 questions below, oldest first.
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Question 1
2021 Paper 18
5Two narrow bores of diameter and are joined together to form a U-shaped tube open at both ends. If this U-tube contains water, what is the difference in the level of two limbs of the tube. [Take surface tension of water , angle of contact and density of water ]Tap an option to check your answer.
Question 2
30 Jan 2023
19The height of liquid column raised in a capillary tube of certain radius when dipped in liquid A vertically is, . If the tube is dipped in a similar manner in another liquid of surface tension and density double the values of liquid , the height of liquid column raised in liquid would beTap an option to check your answer.
Question 3
7 Apr 2025
83A capillary tube of radius 0.1 mm is partly dipped in water (surface tension and glass water contact angle ) with inclined with vertical. The length of water risen in the capillary is cm. (Take )Tap an option to check your answer.
Question 4
21 Jan 2026 S2
13Surface tension of two liquids (having same densities), and , are measured using capillary rise method utilizing two tubes with inner radii of and where . The measured liquid heights in these tubes are and respectively. [Ignore the weight of the liquid about the lowest point of miniscus]. The heights and and surface tensions and satisfy the relation :Tap an option to check your answer.
Question 5
22 Jan 2026 S2
9When a part of a straight capillary tube is placed vertically in a liquid, the liquid raises upto certain height h . If the inner radius of the capillary tube, density of the liquid and surface tension of the liquid decrease by each, then the height of the liquid in the tube will change by %.Tap an option to check your answer.