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प्रश्न
What is the need for measuring length with vernier callipers?
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उत्तर
For measuring the exact length with greater accuracy, especially when we are measuring a very small length, we use an appliance vernier calliper. A vernier calliper can measure accurately up to 1/100 the part of a centimetre.
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संबंधित प्रश्न
Explain the terms : Least count of a screw gauge.
How are they determined?
A screw gauge has a least count 0.001 cm and zero error +0.007 cm. Draw a neat diagram to represent it.
The diameter of a thin wire can be measured by
In the vernier callipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided into 10 parts. While measuring the length, the zero of the vernier lies just ahead of the 1.8 cm mark and the 4th division of vernier coincides with a main scale division.
(a) Find the length.
(b) If zero error of vernier callipers is -0.02 cm,
What is the correct length ?
Fig., below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on the main scale when circular head is rotated once.
Find:
(i) Pitch of the screw gauge,
(ii) Least count of the screw gauge and
(iii) The diameter of the wire.
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.
Which part of vernier callipers is used to measure the internal diameter of a hollow cylinder?
What is the function of ratchet in the screw gauge?
What do you understand by the following term as applied to screw gauge?
Negative zero error
How do you account for positive zero error for calculating the correct diameter of wires?
