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JEE Main20209 Jan 2020Morning ShiftPhysicsExperimental PhysicsActual

If the screw on a screw-gauge is given six rotations, it moves by 3 m m on the main scale. If there are 50 divisions on the circular scale the least count of the screw gauge is:

Options

  1. A0.001 c m
  2. B0.02 m
  3. C0.01 c m
  4. D0.001 m m

Correct answer

A. 0.001 c m

Step-by-step solution

Pitch = 3 6 = 0.5   m m L.C. = 0.5 50   m m = 1 100   m m = 0.1   m m = 0.001   c m

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