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When the two jaws of a vernier callipers...

When the two jaws of a vernier callipers are in touch, zero of vernier scale lies to the right of zero of main scale and coinciding with vernier division `3`. If vernier constant is `0.1 mm`, the zero correction is

A

`-0.03cm`

B

`+0.03cm`

C

`-0.03mm`

D

`+0.03mm`

Text Solution

Verified by Experts

The correct Answer is:
A
Error is positive
`:.` Zero correction is negative
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When the jaws of a vernier callipers are closed the 0th division of its vernier scale is to the right of the zero of the main scale and the V.S.D is 6 .Find the correction to be made to the observed measurement (take its least count as 0.1 mm)

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Knowledge Check

  • The least coun of a vernier calipers is 0.01 cm and if the zero mark of the vernier scale is right of zero of the main scale and the vernier coincidence is 7 when the jaws are in contact then the zero error is "_______" cm.

    A
    `+6 xx 0.01`
    B
    `+7 xx 0.01`
    C
    `-7 xx 0.01`
    D
    `- 6 xx 0.01`

  • When the jaws of a vernier calipers are in contact the eight division of the vernier scale coincides with the seventh division of the main scale . If N is the number of division on the vernier scale and least count x then the zero error corrections is

    A
    `-8x`
    B
    `(N-8)`
    C
    `(N-8)x`
    D
    `+8x`

  • A vernier callipers used by student has 20 divisions in 1cm on main scale. 10 vernier divisions coincide with 9 main scale divisions. When jaws are closed, zero of main scale is on left of zero of vernier scale and 6th divisions of vernier scale coincides with any mains scale divisions. He placed a wooden cylinder in between the jaws and measure the length. The zero of vernier scale is on right of 3.2 cm mark of main division and 8th division of vernier scale with any main scale division. When he measures diameter of cylinder he finds that zero of vernier scale lies on right of 1.5 cm mark of main scale and 6th division of vernier scale coincides with any main scale division. Least count and zero error of vernier callipers are

    A
    `0.05cm`, `+0.3cm`
    B
    `0.05mm`, `-0.3mm`
    C
    `0.005cm`, `+0.03cm`
    D
    `0.05cm`, `-0.3cm`

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