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प्रश्न
In the following figure, the pitch of the screw is 1 mm. Calculate:
(i) the least count of screw gauge and
(ii) the reading represented in the figure.
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उत्तर
Screw gauge in the figure
(i) Pitch of the screw = 1 mm
Divisions on circular scale= 100
least count = pitch of the screw/ divisions on the main scale
L.C. = 1/100 = 0.01 mm= 0.001 cm
(ii) LC. = 0.001 cm
the main scale reading = 2 mm= 0.2 cm
from the figure it is clear that base line coincides with the 97th division of the circular scale.
So, circular scale reading= 97 X 0.001 cm = 0.097 cm Hence, reading shown In the figure= 0.2 + 0.097 = 0.297 cm
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संबंधित प्रश्न
Explain the terms : Least count of a screw gauge.
How are they determined?
The thimble of a screw gauge has 50 divisions. The spindle advances 1 mm when the screw is turned through two revolutions.
(i) What is the pitch of the screw gauge?
(ii) What is the least count of the screw gauge?
When a screw gauge with a least count of 0.01 mm is used to measure the diameter of a wire, the reading on the sleeve is found to be 1 mm and the reading on the thimble is found to be 27 divisions.
(i) What is the diameter of the wire in cm?
(ii) If the zero error is +0.005 cm, what is the correct diameter?
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
The thimble of a screw gauge has 50 divisions for one rotation. The spindle advances 1 mm when the screw is turned through two rotations.
- What is the pitch of the screw?
- What is the least count of screw gauge?
- When the screw gauge is used to measure the diameter of wire the reading on the sleeve is found to be 0.5 mm and reading on thimble is found, 27 divisions. What is the diameter of the wire in centimetres?
State whether the following statement is true or false by writing T/F against it.
The least count of a screw gauge can be lowered by increasing the number of divisions on its thimble.
State whether the following statement is true or false by writing T/F against it.
The metre scale, vernier calipers, and screw gauge are in decreasing order of least count.
What is the least count in the case of the following instrument?
Thermometer
Least count of a vernier caliper is ______ cm.
The precision of vernier calipers is ______ mm.
