Question

The rise of a liquid in a capillary tube depends on

• A. The material of the tube
• B. The length of the tube
• C. The outer raidus of the tube
• D. The inner radius of the tube

Answer 1

Answer: (A), (B), (D)

The correct options are
A The material of the tube
B The length of the tube
D The inner radius of the tube

Rise of liquid in a capillary tube is
$h=\frac{2T\cos \theta }{rdg}$ and $\theta$ depends on the material of tube.
If capillary is of insufficient length above the liquid level, the liquid rises upto the top of capillary and its surface acquires a new shape having a large radius of curvature. $h$ also depends on the inner radius of the tube. So, (a), (b) and (d) are correct.