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प्रश्न
What do you understand by the term least count of screw?
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उत्तर
Least distance of the screw is defined as the smallest distance moved by its tip when the screw turns through one division marked on it.
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संबंधित प्रश्न
When is a vernier Callipers said to be free from zero error?
Name the part of the vernier callipers which is used to measure the following
Internal diameter of a mug
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.
In figure for vernier callipers, calculate the length recorded.
(a) A vernier scale has 20 divisions. It slides over the main scale, whose pitch is 0.5 mm. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with the main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers.
(b) If the vernier has a negative error of 0.04 cm, calculate the corrected radius of the sphere.
State the correction if the positive error is 7 divisions when the least count is 0.01 cm.
How do you account for positive zero error for calculating the correct diameter of wires?
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.
The following figure shows the reading of a vernier caliper used for measuring the thickness of a metal sheet.
(i) Find the least count of the instrument.
(ii) Calculate the thickness of the metal sheet.
State whether true or false. If false, correct the statement.
With the help of vernier caliper we can have an accuracy of 0.1 mm and with screw gauge we can have an accuracy of 0.01 mm.
