Question

Four identical capillary tubes $a,b,c$ and $d$ are dipped in four beakers containing water with tube ‘$a$’ vertically, tube ‘$b$’ at ${30}^o$, tube ‘$c$’ at ${45}^o$ and tube ‘$d$’ at ${60}^o$ inclination with the vertical. Arrange the lengths of water column in the tubes in descending order.

• A. $d,c,b,a$
• B. $d,a,b,c$
• C. $a,c,d,b$
• D. $a,b,c,d$

Answer 1

The correct option is A $d,c,b,a$

In capillary tube fluid always rise to the same vertical height as when the tube is perfectly vertical. So, the tube which is making greater angle with vertical will get more water in it.
So, order of lengths of water column will be $d>c>b>a$.