CAPILLARITY: EXPRESSION FOR CAPILLARY RISE, EXPRESSION FOR CAPILLARY FALL

CAPILLARITY

Capillarity is defined as a phenomenon of rise or fall of a liquid surface in a small tube relative to the adjacent general level of liquid when the tube is held vertically in the liquid. The rise of liquid surface is known as capillary rise, while the fall of the liquid surface is known as capillary depression. It is expressed in terms of ‘cm’ or ‘mm’ of liquid. Its value depends upon the specific weight of the liquid, diameter of the tube and surface tension of the liquid.

EXPRESSION FOR CAPILLARY RISE:


EXPRESSION FOR CAPILLARY FALL



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