Distance moved by a screw in 5 rotations is 5 mm and total number of circular divisions are 100. The least count of the screw gauge is;
1 mm
0.001 cm
0.0001 cm
0.0001 mm
In 5 rotation distance moved = 5 mm
In 1 rotation distance moved = 1 mm = Pitch
LC = Pitch / Total circular divisions = 1 mm / 100
LC = 0.01 mm = 0.001 cm
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