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Saturday, 31 October

JEE Main · Physics · Atoms

Electron Velocity in Orbit

JEE Main asked Electron Velocity in Orbit 2 times in 2 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Bohr's Atomic Model, in Atoms (Physics). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021 and 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.050.10’170’200.03’210.03’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

  • Ratio of orbital speeds in hydrogen-like ions
  • Scaling of orbital velocity with n

Difficulty

Easy 2Medium 0Hard 0

Every question was multiple choice.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 25 Jun 2022, Shift 1 · Q46The ratio for the speed of the electron in the 3rd3^{rd} orbit of He+\mathrm{He^+} to the speed of the electron in the 3rd3^{rd} orbit of…EasySingle correct
  2. 17 Mar 2021, Shift 1 · Q20If an electron is moving in the nth^{th} orbit of the hydrogen atom, then its velocity (vnv_n) for the nth^{th} orbit is given as :EasySingle correct

Shifts: 17 Mar 2021, Shift 1, 25 Jun 2022, Shift 1.

Same topic

Other ideas in Bohr's Atomic Model

Bohr's Atomic Model has 22 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas