The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its circular scale required to measure $5 \mu \mathrm {~m}$ diameter of a wire is: (1) 50 (2) 100 (3) 500 (4) 200
The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its circular scale required to measure $5 \mu \mathrm {~m}$ diameter of a wire is:\\
(1) 50\\
(2) 100\\
(3) 500\\
(4) 200