Q.

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 60o with the vertical. The length of the liquid column along the tube is

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a

9cm

b

6cm

c

3cm

d

2cm

answer is B.

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Detailed Solution

Vertical height of the water in the tube remains constant So, l=hcos⁡θ=3cos⁡60∘=6cm
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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 60o with the vertical. The length of the liquid column along the tube is