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The smallest division on the main scale ...

The smallest division on the main scale of a vernier calipers is 0.1cm. Ten divisions of the vernier scale correspond to nine divisions of the main scale. The figure below on the left shows the reading of this calipers with no gap between in two jaws. The figure on the right shows the reading with a solid sphere held between the jaws. The correct diameter of the sphere is.

A

3.07 cm

B

3.11 cm

C

3.15 cm

D

3.17 cm

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19 divisions on the main scale of a vernier callipers coincide with 20 divisions on the vernier scale. If each division on the main scale is of 1 cm , determine the least count of instrument.

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Knowledge Check

  • The main scale of a vernier callipers has n divisions/cm. n divisions of the vernier scale coincide with (n-1) divisions of main scale. The least count of the vernier callipers is,

    A
    `(1)/(n(n+1))cm`
    B
    `(1)/((n+1)(n-1))cm`
    C
    `(1)/(n)cm`
    D
    `(1)/(n^2)cm`

  • A vernier callipers has 20 divisions on the vernier scale which coincide with 19 divisions on the main scale. The least count of the instrument is 0.1 mm. The main scale divisions are of

    A
    0.5 mm
    B
    1 mm
    C
    2 mm
    D
    `1//4` mm

  • One division on the main scale of a vernier callipers is equal to 1 mm. its vernier scale has 20 equal divisions which match with 16 main scale division. The least countof the vernier calipers is

    A
    0.02 mm
    B
    0.2 mm
    C
    0.8mm
    D
    0.08mm

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