A capillary tube is dipped in water. The height of the water column in the tube

Practice Questions

Q1
A capillary tube is dipped in water. The height of the water column in the tube is determined by which of the following?
  1. Surface tension and density of the liquid
  2. Only surface tension
  3. Only density of the liquid
  4. Viscosity of the liquid

Questions & Step-by-Step Solutions

A capillary tube is dipped in water. The height of the water column in the tube is determined by which of the following?
Correct Answer: Surface tension and density of the liquid
  • Step 1: Understand that a capillary tube is a very thin tube.
  • Step 2: When the tube is dipped in water, the water tries to rise inside the tube.
  • Step 3: The height of the water column depends on two main factors: surface tension and density.
  • Step 4: Surface tension is the force that makes the water molecules stick together and rise in the tube.
  • Step 5: Density is the mass of the water compared to its volume, which affects how high the water can rise.
  • Step 6: Both surface tension and density work together to determine the final height of the water column in the tube.
  • Capillarity – The phenomenon where liquid rises or falls in a narrow tube due to surface tension and adhesive forces between the liquid and the tube's walls.
  • Surface Tension – The cohesive force at the surface of a liquid that causes it to behave as an elastic sheet, influencing the height of the liquid column in a capillary tube.
  • Density of Liquid – The mass per unit volume of a liquid, which affects the weight of the liquid column and thus its height in the capillary tube.
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