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In a vernier ...

Question

In a vernier calipers having $10 V S D$ , the vernier constant is $0.1 m m$ . When the jaws are closed, zero of vernier lies to the left of zero of main and $7 t h$ Vsd coincides with a main scale division. When a cylinder is placed between the jaws the main scale reading was $7.7 c m$ and vernier scale read 8 divisions. What is the diameter of the cylinder ?

A

77.8 m m

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B

78.1 m m

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C

77.5 m m

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D

78.5 m m

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Solution

The correct option is B $78.1 m m$
Based on screw gauge experiment

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Similar questions

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

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Q. In a vernier calipers, the zero of the vernier scale is to the left of the zero of the main scale when the movable jaw is in contact with the fixed jaw. If the seventh division on the vernier scale coincides with the 5th division on the main scale, determine the zero error. Take 1 MSD = 1 mm, and 20 VSD = 19 MSD.

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