Discussion
True or False :
(I) Capillary forces are inversely proportional to the diameter of the conduits or pores transmitting the water.
(II) Capillary fringe is thicker in sandy soils or regolith than in clay grade soils.
Answer: A
(I) is true, (II) is false.
The height of capillary rise is inversely proportional to the radius of the pore or tube:
\[ h = \frac{2\gamma \cos\theta}{\rho g r} \]
so narrower pores raise water higher, as statement I says.
It follows that statement II is false. Clay-grade soils have very fine pores, so water rises much higher in them and their capillary fringe is thicker (up to a metre or more), while coarse sand, with large pores, has a thin fringe of only a few centimetres.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development