JEE Main 2021PhysicsExperimental PhysicsEasyMCQ

JEE Main 2021 — Experimental Physics Question with Solution

JEE Main 2021 (17 Mar Shift 1)

Question

The vernier scale used for measurement has a positive zero error of 0.2 mm. If while taking a measurement it was noted that 0 on the vernier scale lies between 8.5 cm and 8.6 cm. Vernier coincidence is 6, then the correct value of measurement is cm.

(least count=0.01 cm)

Choose an option

Show full solutionCorrect option: B
Correct answer
B8.54 cm

Step-by-step explanation

Positive zero error =0.2 mm

Main scale reading =8.5 cm

Vernier scale reading=6×0.01=0.06 cm

Final reading=8.5+0.06-0.02=8.54 cm

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About this question

This is a previous-year question from JEE Main 2021, 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.