GENERAL KNOWLEDGE

Detailed explanation-1: -The smallest value that can be measured by the measuring instrument is called its least count. Measured values are good only up to this value. The least count error is the error associated with the resolution of the instrument. A metre ruler may have graduations at 1 mm division scale spacing or interval.

Detailed explanation-2: -Least count of a measuring instrument is the smallest measurement that can be made accurately with the given measuring instrument. A metre scale normally has graduations at 1 mm (or 0.1 cm) spacing, as the smallest division on its scale.

Detailed explanation-3: -The least count of a measuring instrument is the smallest and accurate value in the measured quantity that can be resolved on the instrument’s scale. The least count is calculated by dividing the main scale reading with the total number of divisions on the secondary scale. It represents the accuracy of measurement.

Detailed explanation-4: -The least count of vernier callipers is also known as the vernier constant. It is defined as the difference between one main scale division and one vernier scale division. Therefore, the least count of vernier calliper is 0.1 mm.