In a screw gauge, the zero of mainscale coincides with fifth division of circular
Channel: Doubtnut
Date: 05/07/2020

In a screw gauge, the zero of mainscale coincides with fifth division of circular  scale in figure (i). The circular division of screw gauge are `50`. It moves `0.5 mm` on main scale In one rotation. The diameter of the ball in figure (ii) is