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The main scale of vernier callipers read...

The main scale of vernier callipers reads in millimetre and its vernier is divided into `10` divisions which coincide with `9` divisions of the main scale. When there is nothing between the jaws of the vernier callipers, the `7th` divisions of vernier scale coincides with a division of main scale and in this case zero of vernier scale is lying on right side of the zero of main scale. When a cylinder is tigthly placed along its length between the jaws, the zero of the vernier scale is slightly left to be `3.1 cm` and `4th VSD` coincides with a scale division. The length of the cylinder is

A

5.21 cm

B

4.34 cm

C

1.38 cm

D

3.07 cm

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • The main scale of vernier callipers reads in millmetre and its vernier is divided into 8 divisions, which coincide with 5 divisions of main scale . Then If when two jaws of instrument touch with each other the 5 ^("th") division of vernier scale coincide with 3^("rd") division of main scale . Then error is

    A
    Positive zero error of magnitude 1.25 mm
    B
    Negative zero error of magnitude 1.25 mm
    C
    positive zero error of magnitude 0.125 mm
    D
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    C
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    B
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    C
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    D
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