The pitch of a screw gauge is 0.5 mm

Asked by admin @ 16/08/2021 in Physics viewed by 390 People

The pitch of a screw gauge is 0.5 mm and there are 100 divisions on it circular scale. The instrument reads

+2 circular scale divisions when nothing is put in-between its jaws. In measuring the diameter of a wire, thereare 8 divisions on the main scale and 83rd circular scale division coincides with the reference line. Then thediameter of the wire is(A) 4.05 mm(B*) 4.405 mm (C) 3.05 mm(D) 1.25 mm.

Answered by admin @ 16/08/2021

The diameter of the wire is 4.415 mm

Explanation:

Length of Pitch of screw gauge = 0.5 mm = 0.5 / 100

= 0.005 mm

Zero error = 2 x 0.005 = 0.01 mm

Final reading = 8 (MSD) + 83 LC

= 8 (0.5) + 83 x 0.005

= 4.415 mm

Thus the diameter of the wire is 4.415 mm

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The pitch of a screw gauge is 0.5 mm

The diameter of the wire is 4.415 mm

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