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Question 30162
JEE Physics · Medium

Errors and Measurements: Vernier — JEE Type MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Vernier — JEE TypeMediumQuestion 30162

Question

A vernier scale has 20 divisions equal to 19 main scale divisions of 1 mm each. The least count is:
  1. A
    0.05 mm
    Correct
  2. B
    0.5 mm
  3. C
    0.1 mm
  4. D
    0.01 mm

Correct answer

0.05 mm

Explanation

1 VSD = 19/20 mm. LC = 1 MSD − 1 VSD = 1 − 19/20 = 1/20 = 0.05 mm.

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