Question
Question: The lower end of a capillary tube is at a depth of 12cm and the water rises 3cm in it. The mouth pre...
The lower end of a capillary tube is at a depth of 12cm and the water rises 3cm in it. The mouth pressure required to blow an air bubble at the lower end will be X cm of water column where X is
A
3
B
9
C
12
D
15
Answer
15
Explanation
Solution
The lower end of capillary tube is at a depth of 12 + 3 = 15 cm from the free surface of water in capillary tube.
So, the pressure required = 15 cm of water column.