Engineering
Physics
Surface Tension and Surface Energy
Capillary and Pressure Difference due to Surface Tension
Question
You dip a capillary tube into a beakers of different fluids, and from observation of the shape of the fluid surface deduce that in which figure cohesive forces dominate over adhesive forces.
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Solution
Liquid having positive capilary action have concave meniscus while having negative capillary action have convex meniscus. So B and C are not possible. In case A cohesive force < adhesive force while in case D cohesive force > adhesive force