1.

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`

Answer» Correct Answer - C
`diameter=0.7+(0.035+0.003)=0.738cm`


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