JEE Main 2021 — Structure Of Atom Question with Solution
From: JEE Main 2021 (Online) 25th July Evening Shift
Question
An accelerated electron has a speed of 5 106 ms1 with an uncertainty of 0.02%. The uncertainty in finding its location while in motion is x 109 m. The value of x is ____________. (Nearest integer)
[Use mass of electron = 9.1 1031 kg, h =6.63 1034 Js, = 3.14]
[Use mass of electron = 9.1 1031 kg, h =6.63 1034 Js, = 3.14]
Enter your answer
Show full solutionCorrect answer: 58
Correct answer
58
Step-by-step explanation
m/s
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Structure Of Atom 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 2021, covering the Structure Of Atom chapter of Chemistry. 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.