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JEE Advanced 2018 Paper 1

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Question : 3

Total: 54

A uniform capillary tube of inner radius r is dipped vertically into a beaker filled with water.The water rises to a height h in the capillary tube above the water surface in the beaker. The surface tension of water is σ.The angle of contact between water and the wall of the capillary tube is θ .Ignore the mass of water in the meniscus. Which of the following statements is(are) true?

For a given material of the capillary tube, h decreases with increase in r
For a given material of the capillary tube, h is independent of σ
If this experiment is performed in a lift going up with a constant acceleration, then hdecreases
h is proportional to contact angle θ

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