In a vernier callipers, one main scale division is 1 mm and 9 main scale divisions are equal to 10 vernier scale divisions. When nothing is put between jaws of the callipers, zero of the vernier scale lies to the right side of zero of the main scale and the 2nd division of the vernier scale coincides with a main scale division. While measuring inner diameter of a hollow cylinder the zero of vernier scale lies between 1.7 cm and 1.8 cm of the main scale. Also, 8th division of the vernier scale coincides with a main scale division. Inner diameter of the cylinder is

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Q. The main scale of a vernier callipers reads 10 mm in 10 divisions of Vernier scale coincide with 9 divisions of the main scale. When a cylinder is tightly placed between the two jaws, the zero of vernier scale lies slightly behind 3.2 cm and the fourth vernier division coincides with a main scale division. The diameter of the cylinder is :

Q. The least count of the main scale of a vernier callipers is

1 mm

. Its vernier scale is divided into

10

divisions and coincide with

9

divisions of the main scale. When jaws are touching each other, the

7^{th}

division of vernier scale coincides with a division of main scale and the zero of vernier scale is lying right side of the zero of main scale. When this vernier is used to measure length of a cylinder the zero of the vernier scale between

3.1 cm

and

3.2 cm

and

4^{th} VSD

coincides with a main scale division. The length of the cylinder is

(VSD

is vernier scale division

)

Q. The smallest division on the main scale of a Vernier callipers is

1 mm

and 10 vernier divisions coincide with 9 main scale divisions. While measuring the diameter of a ring, the zero mark of the vernier scale lies between

5.0 cm

and

5.1 cm

and the eighth division of the vernier scale coincides with a main scale division. The diameter of the ring is :

Q. Consider a vernier caliper. Least count of main scale is

1 m m

. There are 20 equispaced marks on vernier scale. When nothing is put between the jaws, zero of main scale lies between zero and first division of vernier scale and 15th division of vernier exactly coincide with one of the main scale division. When zero of vernier is matched with zero of main scale, 20th division of vernier exactly coincides with 25th division of main scale. To measure the side of a cuboid, it is kept between the jaws of vernier caliper, it is now observed that 18th division of vernier exactly coincides with 32th division of main scale. Choose the correct option(s).

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 vernier scale is ahead of zero of main scale and 3rd division of vernier scale coincides with a main scale division. Find : (i) the least count and (ii) the zero error of the vernier callipers.

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