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Using screw gauge of pitch 0 . 1 cm and 50 divisions on its circular scale, the thickness of an object is measured. It should correctly be recorded as,

Options

  1. A2 . 121 cm
  2. B2 . 124 cm
  3. C2 . 125 cm
  4. D2 . 123 cm

Correct answer

B. 2 . 124 cm

Step-by-step solution

Thickness =   M . S . Reading + Circular Scale Reading ( L . C . ) Here least count is 0 . 002   cm   per   division . From all the four options, the second answer is divisible by this least count. Hence option 2 is correct.

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