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JEE Main20206 Sep 2020Morning ShiftPhysicsExperimental PhysicsActual

A screw gauge has 50 divisions on its circular scale. The circular scale is 4 units ahead of the pitch scale marking, prior to use. Upon one complete rotation of the circular scale, a displacement of 0 . 5 mm is noticed on the pitch scale. The nature of zero error involved and the lest count of the screw gauge, are respectively:

Options

  1. ANegative, 2 μ m
  2. BPositive 10 μ m
  3. CPositive 0 . 1 m m
  4. DPositive, 0 . 1 μ m

Correct answer

B. Positive 10 μ m

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