Question

how many total number of division on the vernier scale
(N)

Answer 1

Usually, the main scale has divisions of d 1 = 1 mm , and Vernier scale divisions correspond with main scale divisions. Now, main scale divisions of each make , and hence each Vernier scale division has length d 2 = 9 10 =0.9 mm . Thus, the least count comes out to be l = d 1 − d 2 = 1 − 0.9 = 0.1mm .

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