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While measuring diameter of a wire using...

While measuring diameter of a wire using a screw gauge the main scale reading is `7mm` and zero of circular scale is `35` divisions above the reference line. If the screw gauge has a zero error of `-0.003cm`, the correct diameter of the wire is (given least count `=0.001cm`)

A

`0.735cm`

B

`0.732cm`

C

`0.738 cm`

D

`7.38 cm`

Text Solution

Verified by Experts

The correct Answer is:
C
`diameter=0.7+(0.035+0.003)=0.738cm`
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