The given diagram represents a screw gauge. The circular scale is divided into `50` divisions
Channel: Doubtnut
Date: 2020-07-05

The given diagram represents a screw gauge. The circular scale is divided into `50` divisions and the linear scale is divided into millimeters. If the screw advances by `1 mm` when the circular scale makes `2` complete revolutions, find the least count of the instrument and the reading of the instrument in the figure.  img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/DCP_V01_C03_E01_068_Q01.png" width="80%"