Question

If a capillary tube is tilted to 45 degree and 60 degree from vertical then ratio of length of l1 and l2 of liquids columns in it will be

Answer 1

Answer:

Correct option is

A

1:2by root

The expression for the capillary rise in a tube is given by, 

H = ρgr2Tcosθ

where θ is the contact angle and not the angle of tilt.

Thus, for all parameters constant,

at 60o

l1=Hcos600 = H/2

At 45o

l2=Hcos450 = H/2

Therefore the ratio of the 2 lengths is given by,

l1/l2=21 by root