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Question

The rise of a liquid in a capillary tube depends on
(a) the material
(b) the length
(c) the outer radius
(d) the inner radius of the tube

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Solution

Correct option: (a), (b), (d)

Height of the liquid in the capillary tube is given by:h = 2Scosθrρgh = HeightS = Surface tensionr =Inner radius of the tubeρ= Density of the liquidg = Acceleration due to gravitya) θ and ρ depend upon the material of the capillary tube and the liquid.b) h is dependent on the length of the tube. If the length is insufficient, then h will be low.d) r is the inner radius of the tube.

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