Physics · 2020
JEE Main · 9 January 2020, Shift 1 · Q19
If the screw on a screw-gauge is given six rotations, it moves by 3 mm on the main scale. If there are 50 divisions on the circular scale the least…
If the screw on a screw-gauge is given six rotations, it moves by $\displaystyle 3$ mm on the main scale. If there are $\displaystyle 50$ divisions on the circular scale the least count of the screw gauge is :
Official answer
(3)
0.$\displaystyle 001$ cm
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