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Question

# Figure shows a capillary tube of radius r dipped into water. The atmospheric pressure is P0 and the capillary rise of water is h. s is the surface tension for water-glass. Initially, h=10 cm. If the capillary tube is now inclined at 45∘, the length of water rising in the tube will be

A
10 cm
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B
102 cm
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C
102 cm
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D
None
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Solution

## The correct option is B 10√2 cm If number of capillary tubes are in the fluid at different angles then the capillary rise will be the same in all tubes that is independent of angle. In this case the height of water rise is same but they ask the length of tube upto which water rise. so, lcosθ=h l=hcos45 l=10√2 cm

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