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N divisions on the main scale of a verni...

N divisions on the main scale of a vernier callipers coincide with (N + 1) divisions on the vernier scale. If each division on the main scale is 'a' units, then the least count of the instrument is

A

`(a)/(N+1)`

B

`(a)/(N-1)`

C

`(N)/(N+1)`

D

`(a)/(N)`

Text Solution

Verified by Experts

The correct Answer is:
A
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