In a complete rotation, spindle of a screw gauge advances by `(1)/(2)mm`. There are `50` divisi
Channel: Doubtnut
Date: 2020-02-09

In a complete rotation, spindle of a screw gauge advances by `(1)/(2)mm`. There are `50` divisions on circular scale. The main scale has `(1)/(2)mm` marks to (is graduated to `(1)/(2)mm`) If a wire is put between the jaws, `3` main scale divisions are clearly visible, and `20th` division of circular scale coincides with reference line. Find diameter of wire in correct significant figures.