JEE Main & Advanced
Physics
Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन
Question Bank
Capillarity
question_answer
A capillary tube when immersed vertically in liquid records a rise of 3 cm. If the tube is immersed in the liquid at an angle of \[{{60}^{0}}\]with the vertical. The length of the liquid column along the tube is [MH CET (Med.)1999]
A)9cm
B) 6cm
C) 3cm
D) 2cm
Correct Answer:
B
Solution :
Vertical height of the water in the tube remains constant So, \[l=\frac{h}{\cos \theta }=\frac{3}{\cos {{60}^{o}}}=6\ cm\]