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Show that a screw gauge of pitch I mm an...

Show that a screw gauge of pitch I mm and 100 divisions is more precise than a vernier caliper with 20 divisions on the sliding scale.

Text Solution

Verified by Experts

Least count of screw gauge
`=("Pitch")/("No. of divisions")=1/100=0.01` mm (or ) 0.001 cm
on the Head scale.
Least count of vernier calipers.
`=1MSD-1VSD=(-1-19//20)` MSD
`=1/20=0.05cm`
So screw gauge is more precise than vernier.
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