Question

When will the height of water in capillary tube be minimum?

Answer 1

The height of water in a capillary tube will be minimum when the water is at a temperature of 4°C.

• The rise in height of a liquid in a capillary tube is given by the formula :

h = (2Tcos θ ) / (rdg) , where d is the density of liquid.

• It is evident from the formula that the height of liquid in a capillary is inversely proportional to the density of the liquid.

• Since water has its maximum density at 4°C, its height is minimum in the capillary tube at a temperature of 4°C.