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प्रश्न
How do you account for positive zero error for calculating the correct diameter of wires?
उत्तर
If the zero lines, marked on a circular scale, is below the reference line of the main scale, then there is a positive zero error and the correction is negative. In figure 5th, circular scale division is coinciding with the reference line.
∴ Correction = – Coinciding division of C.S. × L.C.
= – 5 × 0.001 cm
= – 0.005 cm
If the observed diameter is 0.557 cm, then:
Corrected diameter
= Observed diameter + Correction
= 0.557 cm – 0.005 cm
= 0.552 cm
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संबंधित प्रश्न
A vernier callipers has its main scale graduated in mm and 10 divisions on its vernier scale are equal in length to 9 mm. When the two jaws are in contact, the zero of the vernier scale is ahead of the zero of the main scale and the 3rd division of the vernier
scale coincides with a main scale division.
Find : (i) The least count and
(ii) The zero error of the vernier callipers.
Up to how many decimal places can a common vernier callipers measure the length in cm?
State the formula for determining a pitch
What do you understand by the following term as applied to screw gauge?
Positive zero error
Name the measuring employed to measure the diameter of a pencil.
State whether the following statement is true or false by writing T/F against it.
A metre scale can measure a length of 6.346 cm.
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
How will you find the Zero Error of Vernier Caliper? Explain.
