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What is capillary? What is capillarity or capillary action? |
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Answer» (1) A tube of narrow bore (i.e. very small diameter) is called a capillary tube. The word capillary is derived from the Latin capillus meaning hair, capillaris in Latin means ‘like a hair’. (2) If a capillary tube is just partially immersed in a wetting liquid the liquid rises in the capillary tube. This is called capillary rise. If a capillary tube is just partially immersed in a non-wetting liquid, the liquid falls in the capillary tube. This is called capillary depression. The rise of a wetting liquid and fall of a nonwetting liquid in a capillary tube is called capillarity. |
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