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Two full turns of the circular scale of ...

Two full turns of the circular scale of a screw gauge cover a distance of `1mm` on its main scale. The total number of divisions on the circular scale is `50`. Further, it is found that the screw gauge has a zero error of `- 0.03mm`. While main scale reading of `3mm` and the number of circular scale divisions in line with the main scale as `35`. the dimeter of the wire is

A

`3.32mm`

B

`3.73mm`

C

`3.67mm`

D

`3.38mm`

Text Solution

Verified by Experts

The correct Answer is:
D
pitch`=0.5mm`
least count`=0.01mm`
zero error`=-0.03mm`
`implies"correction"+0.03mm`
`:. "Diameter"=3.35+0.03=3.38mm`
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