JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 30 July 2022, Shift 2, Physics Q17

Question 17 of 90 in this shift, Physics question 17 of 30, Section A.

Using Boh'r model of quantization of angular momentum the relation between the radius 'r' of the n

^{\mathrm{th}}

allowed orbit of quantum number 'n' for an electron in hydrogen atom is:

(1) $r \propto n^{\frac{1}{2}}$
(2) $r \propto n^2$ Official answer
(3) $r \propto \left(\frac{1}{n}\right)^2$
(4) $r \propto \left(\frac{1}{n}\right)^{\frac{1}{2}}$

Official answer

Option 2

NTA final key.

Chapter: Atoms
Topic: Bohr's Atomic Model
Idea tested: Bohr Orbit Radius

Same idea in other shifts

Asked 6× in all

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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.