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प्रश्न
State the formula for calculating the least count of screw.
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उत्तर
Least count of screw
= `"Pitch"/"Number of circular scale divisions"`
E.g. If pitch of screw is 1 mm and there are 100 divisions on the circular scales, then
Least count = `(1 "mm")/100` = 0.01 mm
L.C. = 0.01 mm or 0.001 cm
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संबंधित प्रश्न
Define the term 'Vernier constant'.
Describe in steps, how would you use a vernier callipers to measure the length of a small rod?
State one use of a screw gauge.
Why is the metre length in terms of the wavelength of light considered more accurate?
What do you understand by the following term as applied to screw gauge?
Negative zero error
Consider the following case where the zero of vernier scale and the zero of the main scale are clearly seen. If L.C. of the vernier calipers is 0.01 cm, write the zero error and zero correction of the following.
The following diagrams (Fig. 5) show the use of a vernier caliper under three different situations. Study the diagrams carefully and note down the vernier readings in each case.
(a) Measuring the diameter of the rod
(b) Measuring Internal diameter of a cavity
(c) Measuring depth of a cavity
The precision of vernier calipers is ______ mm.
