JEE Main 2022PhysicsExperimental PhysicsMediumNumerical

JEE Main 2022 — Experimental Physics Question with Solution

JEE Main 2022 (26 Jun Shift 2)

Question

A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1 cm on main scale and 50 Vernier scale divisions are equal to 49 main scale divisions, then least count of the travelling microscope is _____ ×10-6 m.

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Show full solutionCorrect answer: 5
Correct answer
5

Step-by-step explanation

Given here, main scale reading, MS=140 cm

And, 50×VS=49×MS

Least count of travelling microscope is LC=MS-VS

=MS-4950 MS

=150×MS

=150×140 cm=12000×10-2 m

=5×10-6 m

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About this question

This is a previous-year question from JEE Main 2022, 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.