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प्रश्न
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उत्तर
Due to constant use, there is space for the play of screw gauge but gradually this space increases with the use or wear and tear so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head. The error due to this is known as backlash error.
It is avoided by turning the screw always in the same direction.
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संबंधित प्रश्न
Define the term 'Vernier constant'.
What do you mean by zero error of a screw gauge? How is it accounted for?
Figure shows the position of vernier scale while measuring the external length of a wooden cylinder.
- What is the length recorded by the main scale?
- Which reading of vernier scale coincides with the main scale?
- Calculate the length.
What do you understand by the following term as applied to micrometre screw gauge?
Thimble scale
What is the least count in the case of the following instrument?
Thermometer
Define the least count of an instrument.
A vernier caliper using the scale invented by Galileo.
