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JEE Main 20209 JanuaryMorning Shift

Exam: JEE Main
Year: 2020
Date: 9 January
Shift: Morning Shift
Subject: Physics
Chapter: Experimental Physics

JEE Main 2020 · 9 January · Morning Shift · Physics · Experimental Physics

If the screw on a screw-gauge is given six rotations, it moves by...

If the screw on a screw-gauge is given six rotations, it moves by

3mm

on the main scale. If there are

50

divisions on the circular scale the least count of the screw gauge is:

Options

A $0.001cm$
B $0.02m$
C $0.01cm$
D $0.001mm$

Correct answer

A. $0.001cm$

Step-by-step solution

Pitch $= \dfrac{3}{6} = 0.5mm$
L.C. $= \dfrac{0.5}{50}mm = \dfrac{1}{100}mm = 0.1mm = 0.001cm$

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