Everyday physics: Why blotting paper absorbs ink. The absorption of liquid ink into blotting paper occurs due to which physical effect in porous materials? Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
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ACapillary action (capillarity)
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BOsmosis across fibers
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CElectrostatic attraction
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DViscous drag only
Answer
Correct Answer: Capillary action (capillarity)
Explanation
Given data
- Porous paper absorbs ink spontaneously.
ConceptIn narrow pores, surface tension and adhesion create capillary rise, drawing liquid into the material.
Final AnswerCapillary action (capillarity)