The length of a cylinder is with the help of vernier callipers whose nine division of main scale are equal to ten divisions of vernier scale. Smallest division on the main scale is 0.5mm. it is observed that zero of vernier scale has just crossed the 78th division of main scale, if fourth division of vernier coincides with any main scale division. The length of cylinder is-

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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 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. Let main scale division of a vernier callipers is 1 mm. With zero of vernier coinciding with the zero of main scale, the

50^{t h}

division of vernier scale coincides with

49^{t h}

division of main scale. The least count of the vernier is

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.

Q. 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. The zero error of the vernier callipers is

3 \times 10^{- x} c m

. Find the value of x.

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