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The circular scale of screw gauge after ...

The circular scale of screw gauge after two complete rotations advances 1 mm along the linear scale. The circular scale has 50 equal divisions and the mechanical error of the screw gauge is -0.03 mm . The linear scale reading =3 mm and the circular scale reading =35 when a student attempts to measure the diameter of a wire. Calculate the diameter from the given data.

Text Solution

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The correct Answer is:
3.38 mm
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A screw gauge has 50 circular scale divisions and a pitch of 0.1 cm. When this is used to measure the thickness of a plate the main scale reading is 0.2 cm and the circular scale reading is 35. What is the thickness of the plate?

A screw gauge of pitch 1.0 mm has 200 divisions on its circular scale. Find out its least count.

Knowledge Check

  • A screw gauge has a pitch of 0.5 mm, and has 50 divisions on its circular scale. Its linear and circular scale readings are respectively 2 mm and 25 when the diameter of a sphere is measured by the gauge. The result of this measurement is

    A
    1.2 mm
    B
    1.25 mm
    C
    2.20 mm
    D
    2.25 mm

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