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Question

The rise of a liquid in a capillary tube depends on

A
The material of the tube
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B
The length of the tube
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C
The outer raidus of the tube
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D
The inner radius of the tube
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Solution

The correct options are
A The material of the tube
B The length of the tube
D The inner radius of the tube
Rise of liquid in a capillary tube is
h=2T cos θrdg and θ depends on the material of tube.
If capillary is of insufficient length above the liquid level, the liquid rises upto the top of capillary and its surface acquires a new shape having a large radius of curvature. h also depends on the inner radius of the tube. So, (a), (b) and (d) are correct.

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