Capillary Action
Trending Questions
Q. If the capillary rise of water in a 1 mm diameter tube is 3 cm, the height of capillary rise of water in a 0.2 mm diameter tube in cm will be -
- 1.5
- 7.5
- 15
- 75
Q. The surface tension of water at 20∘C is 75 ×10−3N/m. The difference in the water surfaces within and outside an open-ended capillary tube of 1 mm internal bore, inserted at the water surface would nearly be
- 5 mm
- 10 mm
- 15 mm
- 20 mm
Q. The surface tension of water at 20∘C is 75×10−3 N/m. The difference in water surfaces within and outside an open-ended capillary tube of 1 mm internal bore, inserted at the water surface, would nearly be
- 7 mm
- 11 mm
- 15 mm
- 19 mm
Q. Which one of the following expresses the height of rise or fall of a liquid in a capillary tube?
Where,
w = Specific weight of the liquid
α = Angle of contact of the liquid surface
σ = Surface tension
Where,
w = Specific weight of the liquid
α = Angle of contact of the liquid surface
σ = Surface tension
- 4wdσcosα
- σcosα4wα
- 4σcosαwd
- wd2σcosα