Q. In a kerosene lamp the oil rise up along the wick due to capillary action. This capillary rise occurs when:
Solution:
- The force of cohesion is defined as the force of attraction between molecules of the same substance.
- The force of adhesion is defined as the force of attraction between different substances, such as glass and water.
- Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.
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