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Vernier Caliper

How the verni...

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How the vernier scale reading is calculated

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Q. A vernier caliper has no zero error, one main scale division =

1 mm

9

main scale division =

10

vernier scale divisions. A spring is held between jaws without exerting force on jaws. Main scale reading is

3.4 cm

, and 5th vernier scale division coincides with a main scale division. When jaws are pressed by force of

10 N

on both sides, main scale reading remains

3.4 cm

, but 1st division of vernier scale coincides with a main scale division. Now spring is removed, cut into two pieces and when inserted between jaws without any force, main scale reading =

1.1 cm

and 5th vernier scale division coincides with a main scale. If we apply force of

30 N

on both the jaws, main scale reading gets

1.0 cm

x

vernier scale division coincides with a main scale division. Find

^{'} x^{'}

Q. The edge of a cube is measured using a vernier callipers. [9 divisions of the main scale is equal to 10 divisions of vernier scale and 1 main scale division is 1 mm]. The main scale division reading is 10 and 1 division of vernier scale was found to be coinciding with the main scale. The mass of the cube is 2.736 g. Calculate the density in g/

{c m}^{3}

upto correct significant figures.

Q. The diagram shows part of the vernier scale on a pair of calipers(10 divisions on vernier coincide with 9 divisions on main scale).
Which reading is correct?

Q. A vernier calliper measures the diameter of rod as

1.24 c m

. The vernier callipers has

10

divisions which slide over the main scale of

1 M S D = 0.5 m m .

Find the main scale reading and vernier coincidence.

Q. Consider the following data for a vernier calliper:
10 main scale division = 1 cm.
10 vernier division matches with 9 Main scale division.

While measuring the zero error of the vernier we see that zero of vernier scale is to the right of the zero marking of the main scale with

6^{t h}

vernier division coinciding with main scale divisions.

The actual reading for length measurement is 4.3 cm with 2nd vernier division coinciding with main scale graduation.

Estimate the length.

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