Question
Question: A very narrow capillary tube records a rise of 20 cm when dipped in water. When the area of cross-se...
A very narrow capillary tube records a rise of 20 cm when dipped in water. When the area of cross-section is reduced to one-fourth of former value, water will rise to a height of –
A
10 cm
B
20 cm
C
40 cm
D
80 cm
Answer
40 cm
Explanation
Solution
A µ r2
\ radius becomes half.
As Hr = constt.
\ H becomes double.