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In a vernier callipers, n divisions of i...

In a vernier callipers, n divisions of its main scale match with (n+1) divisions on its vernier scale. Each division of the main scale is a units. Using the vernier principle, calculate its least count.

A

`d//(m - 1)`

B

`d//(m + 1)`

C

`d//m`

D

`md//(m + 1)`

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The correct Answer is:
B
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