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JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 25 June 2022, Shift 1, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

The ratio for the speed of the electron in the

3^{rd}

orbit of

\mathrm{He^+}

to the speed of the electron in the

3^{rd}

orbit of hydrogen atom will be :

(1)1 : 1
(2)1 : 2
(3)4 : 1
(4)2 : 1Official answer

Official answer

Option 4

NTA final key.

Chapter: Atoms
Topic: Bohr's Atomic Model
Idea tested: Electron Velocity in Orbit

Same idea in other shifts

Asked 2× in all

17 Mar 2021, Shift 1 · Q20If an electron is moving in the n $^{th}$ orbit of the hydrogen atom, then its velocity ( $v_n$ ) for the n $^{th}$ orbit is given as :EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.