what is the least count of micrometer

The least count of a micrometer is 0.01 mm. The least count is the smallest value that can be measured by the instruments scale, and it is related to the precision of the instrument. An instrument that can measure smaller changes in a value relative to another instrument has a smaller least count value and is more precise. The least count of an instrument is inversely proportional to the precision of the instrument. The least count error is the error associated with the resolution of the instrument, and it is one of the sources of experimental error in measurements.