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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
When is a vernier Callipers said to be free from zero error?
State three uses of the vernier callipers.
State the purpose of ratchet in a screw gauge.
Which of the following measures a small length to high accuracy : metre rule , vernier callipers or screw gauge?
A screw has a pitch equal to 0.5 mm. What should be the number of divisions on its head so as to read correctly up to 0.001 mm with its help?
(a) A vernier scale has 10 divisions. It slides over the main scale, whose pitch is 1.0 mm. If the number of divisions on the left hand of zero of the vernier scale on the main scale is 56 and the 8th vernier scale division coincides with the main scale, calculate the length in centimetres.
(b) If the above instrument has a negative error of 0.07 cm, calculate the corrected length.
When does a vernier callipers has the positive error?
The circular scale of a screw gauge has 100 divisions. Its spindle moves forward by 2.5 mm when given five complete turns. Calculate
- pitch
- least count of the screw gauge
