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  4. A vernier caliper has 20 divisions on the vernier scale which coincide with 19 divisions on the main scale. The least count of the instrument is 0.1 mm. The main scale divisions are mm

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Q. A vernier caliper has $20$ divisions on the vernier scale which coincide with $19$ divisions on the main scale. The least count of the instrument is $0.1\, mm$. The main scale divisions are _____ mm

Physical World, Units and Measurements

Solution:

$19MSD = 20VSD$
$\therefore $ Least count $=\frac{MSD}{20}=0.1\,mm$
$\Rightarrow MSD=2\,mm$