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Two full turns of the circular scale of a screw gauge cover a distance of 1 ~mm on its main scale. The total number of divisions on the circular scale is 50 . Further, it is found that the screw gauge has a zero error of -0.03 ~mm while measuring the diameter of a thin wire, a student notes the main scale reading of 3 ~mm and the number of circular scale divisions in line with the main scale as 35 . The diameter of t

Options

  1. A3.32 ~mm
  2. B3.73 ~mm
  3. C3.67 ~mm
  4. D3.38 ~mm

Correct answer

D. 3.38 ~mm

Step-by-step solution

Diameter = M.S.R. + C.S.R L.C. + Z.E. =3+35 (0.5 / 50)+0.03=3.38 ~mm

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