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प्रश्न
State the formula for determining least count for a vernier callipers.
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उत्तर
Least count (L.C.) = `"Pitch"/"No. of vernier scale division"`
For example: If the pitch is 0.1 cm and there are ten vernier scale divisions.
Then L.C. = `0.1/10` = 0.01 cm
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संबंधित प्रश्न
Describe the procedure to measure the diameter of a wire with the help of a screw gauge.
A screw gauge has 50 divisions on its circular scale and its screw moves by 1 mm on turning it by two revolutions. When the flat end of the screw is in contact with the stud, the zero of the circular scale lies below the base line and 4th division of the circular scale is in line with the base line. Find
(i) The pitch,
(ii) The least count and
(iii) The zero error of the screw gauge
Up to how many decimal places can a common vernier callipers measure the length in cm?
When does a vernier callipers has the positive error?
Figure shows a screw gauge in which circular scale has 100 divisions. Calculate the least count and the diameter of a wire.
A micrometre screw gauge having a positive zero error of 5 divisions is used to measure diameter of a wire, when reading on the main scale is 3rd division and the 48th circular scale division coincides with baseline. If the micrometer has 10 divisions to a centimetre on the main scale and 100 divisions on a circular scale, calculate
- Pitch of screw
- Least count of screw
- Observed diameter
- Corrected diameter.
What is the function of ratchet in the screw gauge?
