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Question

Draw a neat labelled diagram of a vernier callipers. Name its main parts and state their functions.

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Solution

selina-icse-solutions-class-9-physics-measurements-experimentation-ex1b-9s

Main parts and their functions:

  • Main scale: It is used to measure length correct up to 1 mm.
  • Vernier scale: It helps to measure length correct up to 0.1 mm.
  • Outside jaws: It helps to measure length of a rod, diameter of a sphere, external diameter of a hollow cylinder.
  • Inside jaws: It helps to measure the internal diameter of a hollow cylinder or pipe.
  • Strip: It helps to measure the depth of a beaker or a bottle.

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