Student Login

Home›Chapters›Surface Tension PYQs›Angle of Contact & Capillarity›Question 70

JEE Main 2005 (AIEEE) · Angle of Contact & Capillarity

Angle of Contact & Capillarity question from JEE Main 2005 (AIEEE)

Q70JEE Main 2005 · AIEEEMedium

Angle of Contact & Capillarity

A $20\text{ cm}$ long capillary tube is dipped in water. The water rises up to $8\text{ cm.}$ If the entire arrangement is put in a freely falling elevator the length of water column in the capillary tube will be

Show answer and solution

Answer: (c)

$h = \dfrac{2T\cos\theta}{r\rho g_{\text{eff}}}$ ; in free fall $g_{\text{eff}} = 0$ .
With no effective weight, water rises till the top of the tube (no overflow, the meniscus flattens).
So the water column is the whole tube length, $20$ cm, answer (c).

Report a mistake

More questions on Angle of Contact & Capillarity

The height of the liquid column raised in a capillary tube of certain radius when dipped…MHT CET 2026 (12 May, Shift 2)
Water rises to a height of 2.2 cm in glass capillary tube. The height to which water will…MHT CET 2026 (20 May, Shift 1)
Water rises up to a height h in a capillary tube on the surface of the earth. The value…MHT CET 2026 (14 May, Shift 1)
If we dip capillary tubes of different radii rn in water and the water rises to different…MHT CET 2026 (20 Apr, Shift 2)
In a capillary tube of area of cross-section ' a ' water rises to height ' h '. To what…MHT CET 2026 (17 Apr, Shift 1)
Water rises to a height 3 cm in a capillary tube. If cross-sectional area of capillary…MHT CET 2026 (15 Apr, Shift 1)
A capillary tube is taken from the earth to the surface of the moon. The rise of the…MHT CET 2026 (15 May, Shift 2)
Three liquids have same surface tension and densities ρ₁, ρ₂ and ρ₃ ( ρ₁ < ρ₂ < ρ₃). In…MHT CET 2026 (15 Apr, Shift 2)