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Manipal MET2014PhysicsExperimental Physics

The circular divisions of shown screw gauge are 50 . It moves 0.5 mm on main scale in one rotation. The diameter of the ball is

Options

  1. A2.25 mm
  2. B2.20 mm
  3. C1.20 mm
  4. D1.25 mm

Correct answer

C. 1.20 mm

Step-by-step solution

Zero error =5 0.5 50 =0.05 ~mm Actual measurement aligned & =2 0.5 ~mm +25 0.5 50 -0.05 ~mm & =1 ~mm +0.25 ~mm -0.05 ~mm =1.20 ~mm aligned

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