Learn

Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceOtherEasyApplication

JEE Main 2 April 2025, Shift 1, Physics Q43

Question 43 of 75 in this shift, Physics question 18 of 25, Section A.

Considering Bohr's atomic model for hydrogen atom : (A) the energy of H atom in ground state is same as energy of He+\mathrm{He^+} ion in its first excited state. (B) the energy of H atom in ground state is same as that for Li++\mathrm{Li^{++}} ion in its second excited state. (C) the energy of H atom in its ground state is same as that of He+\mathrm{He^+} ion for its ground state. (D) the energy of He+\mathrm{He^+} ion in its first excited state is same as that for Li++\mathrm{Li^{++}} ion in its ground state. Choose the correct answer from the options given below :
  1. (1)(A), (B) onlyOfficial answer
  2. (2)(A), (C) only
  3. (3)(B), (D) only
  4. (4)(A), (D) only

Official answer

Option 1

NTA final key.

Chapter
Atoms
Topic
Bohr's Atomic Model
Idea tested
Energy Level Calculations

Same idea in other shifts

Asked 3× in all
  1. 2 Apr 2026, Shift 1 · Q44Angular momentum of an electron in a hydrogen atom is 3hπ\frac{3h}{\pi}, then the energy of the electron is ______ eV.EasySingle correct
  2. 6 Apr 2023, Shift 1 · Q34The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength isEasyDiagram basedHas a figure

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 42 of the 174 JEE Main shifts held from 2017 to 2026.