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प्रश्न
What do you mean by capillarity or capillary action?
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उत्तर
In a liquid whose angle of contact with solid is less than 90°, suffers capillary rise. On the other hand, in a liquid whose angle of contact is greater than 90°, suffers capillary fall. The rise or fall of a liquid in a narrow tube is called capillarity or capillary action.
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संबंधित प्रश्न
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(c) The surface tension may be zero.
(d) The contact angle may be 90°.
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Numerical Problem.
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