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Question
In figure for vernier callipers, calculate the length recorded.
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Solution
Main scale divisions of vernier callipers in one centimetre = 10
Pitch = `"Unit of main scale"/"Number of divisions in the unit"`
= `1/10` cm = 0.1 cm
Least count (L.C.) = `"Pitch"/"No. of divisions on the vernier scale"`
L.C. = `0.1/10` cm = 0.01 cm
Here main scale reading = 7.3 cm
Vernier scale reading (V.S.D.) coinciding with main scale = 5th
Length recorded = Main scale reading + L.C. × V.S.D.
= 7.3 + 0.01 × 5
= 7.3 + 0.05
= 7.35 cm
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