A screw gauge gives the following readings when used to measure the diameter of a wire
Main scale reading : 0 mm
Circular scale reading : 52 divisions
Given that displacement of 1 mm on main scale corresponds to one complete rotation of circular scale having 100 divisions on the circular scale.
The diameter of the wire from the above data is;
0.026 cm
0.26 cm
0.052 cm
0.52 cm
L.C. = Pitch / CSD = 1 mm / 100 = 0.01 mm = 0.001 cm
Radius = M.S.R. + L.C
= 0 + 52(0.001) = 0.052 cm
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