UTME exam is here already, For Student writing physics, check out all you need to know abou MEASUREMENT AND UNIT HERE.
1.The Metre rule has an accuracy of up to 0.05cm or 0.5mm
2.The Vernier calipers has an accuracy of up to 0.01cm or 0.1mm
3.The Micrometer has an accuracy of up to 0.001 cm or 0.01mm
4.The Metre rule is used for measuring short distances such as the length of your book while cylindrical objects can be measured with the aid of calipers and metre rule.
5.The vernier calipers is used to measure the diameter of rods and that of internal diameter of tubes and depth of cavities.
6.The micrometer is used for measuring diameters of small objects like wires,small balls.
Micrometer is used when greater accuracy is expected.
For the full gist click the link below
https://poschools.com/jamb-physics-tutorial-s01/