Least count of a screw gauge is defined as

PHYSICS · Single correct · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

Least count of a screw gauge is defined as (1)

\frac{\text{distance moved by thimble on the main scale}}{\text{number of rotations of thimble}}

(2)

\frac{\text{pitch of the screw}}{\text{number of divisions on the circular scale}}

(3)

\frac{\text{number of rotations of thimble}}{\text{number of circular scale divisions}}

(4) None of the above