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 \sigma.The angle of contact between water and the wall of the capillary tube is \theta .Ignore the mass of water in the meniscus. Which of the following statements is(are) true? [JEE Adv 2018 P1]

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 \sigma

If this experiment is performed in a lift going up with a constant acceleration, then hdecreases

h is proportional to contact angle θ

JEE Advanced 2018 Paper 1

Section: Physics

Question : 3 of 54

Marks: +1, -0

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?

[JEE Adv 2018 P1]

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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