A vernier scale consists of 25 divisions on 12 mm spacing and the main scale has 24 divisions on 12 mm. What is the least count?
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Answer:
Given
N = 25
25 VSD = 24 MSD
1 MSD = 1mm
∴LC=
No.ofVSD
MSD
=
25
1mm
=0.04mm
=0.04×10
−1
cm
=0.004cm
=0.004×10
−2
m
=40μm
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