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Question 30123
JEE Physics · Easy

Errors and Measurements: Negative Zero Error MCQ

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Negative Zero ErrorEasyQuestion 30123

Question

A screw gauge shows −0.04 mm when jaws are closed. If a diameter reads 3.42 mm, the corrected diameter is:
  1. A
    3.38 mm
  2. B
    3.42 mm
  3. C
    3.46 mm
    Correct
  4. D
    3.40 mm

Correct answer

3.46 mm

Explanation

For negative zero error (instrument reads less than true), corrected reading = observed + |zero error| = 3.42 + 0.04 = 3.46 mm.

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