Physics · 2019
JEE Main · 12 January 2019, Shift 1 · Q1
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 μ m diameter…
The least count of the main scale of a screw gauge is $\displaystyle 1$ mm . The minimum number of divisions on its circular scale required to measure $\displaystyle 5 \mu \mathrm{~m}$ diameter of a wire is :
Official answer
(3)
$\displaystyle 200$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.