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Which of the following instruments is based on the principle of Archimedes?

Which of the following instruments is based on the principle of Archimedes? Correct Answer Lactometer

The correct answer is Lactometer.

Important Points

  • Lactometer is based on the principle of Archimedes.
  • Archimedes’ principle, states that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid displaced by the body.
  • Instruments like types of hydrometers such as lactometer, saccharometer obey the Archimedes principle.
Key Points
  • Lactometer is a small glass instrument that is used used to find out the amount of water in the milk​.
  • It works on the principle of specific gravity of milk (Archimede’s Principle). 
  • It measures the relative density of milk with respect to water. 
  • If the specific gravity of a sample of milk is within the approved ranges, the milk is pure and If it is not, then there is some adulteration.
Additional Information
  • Manometer - It is based on the principle of Hydrostatic Balance and is used for measuring the pressure.
  • Auxanometer - For measuring the increase of growth in plants.
  • Odometer - It registers the distance traveled by the vehicle
  • Colorimeter - It is based on Beer-Lambert's law and is used to measure the absorbency of light waves.

  • Saccharometer is a hydrometer used for determining the amount of sugar in a solution.

Related Questions

Consider the following statements for deflection and null type instruments: 1. Deflection type of instruments are more accurate than null type of instruments. 2. Deflection type of instruments can be highly sensitive as compared with the null type of instruments. 3. Null type of instruments are more suitable for measurements under dynamic conditions than deflection type of instruments. Which of the above statements are not correct?
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Select the correct answer:
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