Question

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

Answer 1

Diagram of vernier callipers:

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.