JEE Main 2020PhysicsExperimental PhysicsMediumMCQ

JEE Main 2020 — Experimental Physics Question with Solution

JEE Main 2020 (09 Jan Shift 1)

Question

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:

Choose an option

Show full solutionCorrect option: A
Correct answer
A0.001cm

Step-by-step explanation

Pitch =36=0.5 mm
L.C. =0.550 mm=1100 mm=0.1 mm=0.001 cm

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Experimental Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2020, covering the Experimental Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.