QJEEM19Phf75d: JEE Main 2019 Physics - Class 11 JEEM19Phf75d Solution: The least count of the main scale of a screw gauge is 1 mm. The …

Question

Verified Solution • 2025–26 Session moderate

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 of a wire is :

Accepted Answer

Least count =

\frac{P i t c h}{N u m b e r o f d i v i s i o n o n c i r c u l a r s c a l e}

5

\times

10^{$-$ 6} =

\frac{10^{- 3}}{N}

N = 200

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