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The main scale of Vernier callipers has n divisions/cm. n divisions of the Vernier scale coincide with (n-1) divisions of main scale. the last count of the Vernier callipers is,
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In a Vernier callipers, 1 cm of the main scale is divided into 20 equal parts. 19 divisions of the main scale coincide with 20 divisions on the vernier scale.
BY THIS WAY...
N
N−1
110N
1N−1
Answer :
C
Solution :
Least count = 1 MSD - 1 VSD
(N−1)MSD=N(VSD)⇒VSD=(1−1N)MSD
Least count =1MSD−(1−1N)MSD
=(1N)(1mm)=110Ncm
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