Question

Name the instrument which can accurately measure the thickness of a paper.

Answer 1

Screw gauge:

A screw gauge is an instrument that is used for measuring the diameter of thin wires, and the thickness of thin sheets such as those made up of glass or plastics.

Applications of a screw gauge:

1. To measure the exact diameter of a wire and thus its radius.
2. To measure the fine thickness of a slab of glass or a metallic sheet.
3. To measure the diameter or radius of a lead shot and hence determine its volume.
4. To measure the exact volume of an irregular or regular lamina of uniform thickness.

Thus, a screw gauge is an instrument that can accurately measure the thickness of a paper.