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Properties of Matter question

2019 · Shift 1 · Q41
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Properties of Matter question

2019 · Shift 1 · Q41

JEE AdvancedPhysicsProperties of MatterMultiple correct+4 / −1
A cylindrical capillary tube of 0.2 mm radius is made by joining two capillaries T1 and T2 of different materials having water contact angles of 0 ∘^\circ∘ and 60 ∘^\circ∘, respectively. The capillary tube is dipped vertically in water in two different configurations, case I and II as shown in figure. Which of the following option(s) is (are) correct? [Surface tension of water = 0.075 N/m, density of water = 1000 kg/m3, take g = 10 m/s2] JEE Advanced 2019 Paper 1 Offline Physics - Properties of Matter Question 28 English
  1. A
    For case I, if the joint is kept at 8 cm above the water surface, the height of water colomn in the tube will be 7.5 cm. (Neglect the weight of the water in the meniscus).
  2. B
    For case I, if the capillary joint is 5 cm above the water surface, the height of water column raised in the tube will be more than 8.75 cm. (Neglect the weight of the water in the meniscus).
  3. C
    The correction in the height of water column raised in the tube, due to weight of water contained in the meniscus, will be different for both cases.
  4. D
    For case II, if the capillary joint is 5 cm above the water surface, the height of water column raised in the tube will be 3.75 cm. (Neglect the weight of the water in the meniscus).
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