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Saturday, 31 October

JEE Main 2025 · PhysicsMultiple choiceTwo statementsEasyConceptual

JEE Main 4 April 2025, Shift 2, Physics Q41

Question 41 of 75 in this shift, Physics question 16 of 25, Section A.

Given below are two statements : Statement (I) : The dimensions of Planck's constant and angular momentum are same. Statement (II) : In Bohr's model electron revolve around the nucleus only in those orbits for which angular momentum is integral multiple of Planck's constant. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both Statement I and Statement II are correct
  2. (2)Both Statement I and Statement II are incorrect
  3. (3)Statement I is correct but Statement II is incorrectOfficial answer
  4. (4)Statement I is incorrect but Statement II is correct

Official answer

Option 3

NTA final key.

Chapter
Atoms
Topic
Bohr's Atomic Model
Idea tested
Angular Momentum Quantization

Same idea in other shifts

Asked 9× in all
  1. 4 Apr 2024, Shift 2 · Q48According to Bohr's theory, the moment of momentum of an electron revolving in 4th^{th} orbit of hydrogen atom is:EasySingle correct
  2. 5 Apr 2024, Shift 2 · Q48The angular momentum of an electron in a hydrogen atom is proportional to : (Where r is the radius of orbit of electron)EasySingle correct
  3. 6 Apr 2023, Shift 2 · Q43A small particle of mass mm moves in such a way that its potential energy U=12mω2r2U=\frac{1}{2}m\omega^2 r^2 where ω\omega is constant and rr…MediumSingle correct
  4. 10 Apr 2023, Shift 1 · Q44The angular momentum for the electron in Bohr's orbit is LL. If the electron is assumed to revolve in second orbit of hydrogen atom, then…EasySingle correct
  5. 25 Jul 2022, Shift 1 · Q48The momentum of an electron revolving in nthn^{\mathrm{th}} orbit is given by : (Symbols have their usual meanings)EasySingle correct
  6. 27 Jun 2022, Shift 1 · Q48A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the…EasySingle correct
  7. 30 Jun 2022, Shift 1 · Q50A hydrogen atom in ground state absorbs 12.09 eV of energy. The orbital angular momentum of the electron is increased by :MediumSingle correct
  8. 17 Mar 2021, Shift 2 · Q29A particle of mass m moves in a circular orbit in a central potential field U(r)=U0r4\mathrm{U(r)=U_0r^4}. If Bohr's quantization conditions are…MediumNumerical value

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.