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The vernier of a circular scale is divid...

The vernier of a circular scale is divided into `30` divisons, which coincides with `29` main scale divisions. If each main scale division is `(1//2)^@` the least count of the instrument is `(1^@=60')`

A

`0.1`

B

`1'`

C

`10'`

D

`30'`

Text Solution

Verified by Experts

The correct Answer is:
B

`30VS=29 MS` and `1MS=(1//2)^@`
Least count `=1MS-1VS=1MS-29/30MS`
`=1/30MS=1/30x1/2=1/60^@=1'`
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