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Finding Significant Figures

Each division...

Question

Each division on the main scale of a Vernier callipers is 1mm. Which of the following Vernier scales give the least count equal to 0.01mm ?

(A)9 mm divided into 100 divisions

(B)99 mm divided into 100 divisions

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Solution

vernier constant = each division on main scle - vernier scale divisions

= 1mm - (99mm / 100mm)

=(100 mm -99 mm)/100

= 1mm / 100

=0.01 mm

so option B

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