The pitch of a screw gauge having 50 divisions on its circular scale is . When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 divisions below the line of graduation. When a wire is placed between the jaws, 3 linear scale divisions are clearly visible while 31st division on the circular scale coincides with the reference line. Find diameter of the wire.
L C
Positive zero error
Linear scale reading =3 (pitch) =
Circular scale reading =
Measured diameter of wire
Actual diameter of wire