The nth division of main scale coincides with (n+1)th division of vernier scale. Given one main scale division is equal to 'a' units. The least count of vernier is
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a
na+1
b
an+1
c
an
d
an
answer is B.
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Detailed Solution
Least Count of vernier calipers=value of1 Main Scale DivisionNumber of Vernier Scale Division=an+1 obtained after substituting the given values Least count =M.S.D -V.S.D Given( n+1) vsd=n msd L.C=M.S.D-V.S.D=M.S.D- n M.S.Dn+1=1 M.S.Dn+1=an+1