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A vernier callipers has 1 mm marks on the main scale. It has 20 equal divisions on the vernier scale which match with 16 main scale divisions. For this vernier callipers, the least count is
  • a)
    0.02 mm
  • b)
    0.05 mm
  • c)
    0.1 mm
  • d)
    0.2 mm
Correct answer is option 'D'. Can you explain this answer?
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A vernier callipers has 1 mm marks on the main scale. It has 20 equal ...
Explanation:

  • The main scale of the vernier caliper has 1 mm marks, which means that it can measure up to 1 mm accuracy.

  • The vernier scale has 20 equal divisions, which match with 16 main scale divisions. This means that the length of one vernier scale division is:

  • Length of 1 main scale division = 1 mm

    Length of 1 vernier scale division = (16/20) x 1 mm = 0.8 mm

    Therefore, the least count of the vernier caliper is:

  • LC = 1 main scale division - 1 vernier scale division

  • LC = 1 mm - 0.8 mm

    LC = 0.2 mm


Therefore, the correct answer is option D (0.2 mm).
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A vernier callipers has 1 mm marks on the main scale. It has 20 equal divisions on the vernier scale which match with 16 main scale divisions. For this vernier callipers, the least count isa)0.02 mmb)0.05 mmc)0.1 mmd)0.2 mmCorrect answer is option 'D'. Can you explain this answer?
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