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, \[l=\frac{h}{\cos \theta }=\frac{3}{\cos {{60}^{o}}}=6\ cm\]