Question

A liquid rises to a height of 2.8 cm in a glass capillary 'A'. Another glass capillary 'B' having a diameter of 80% of capillary 'A' is immersed in the same liquid. The rise of liquid in capillary 'B' is ______

Options

• 1.4 cm

• 1.8 cm

• 3.5 cm

• 2.2 cm

Answer 1

A liquid rises to a height of 2.8 cm in a glass capillary 'A'. Another glass capillary 'B' having a diameter of 80% of capillary 'A' is immersed in the same liquid. The rise of liquid in capillary 'B' is 3.5 cm.

Explanation:

`"h"_1"r"_1 = "h"_2"r"_2`

∴ `"h"_2 = ("h"_1"r"_1)/"r"_2 = (2.8 xx "r")/(0.8"r")` = 3.5 cm