Atomic Physics — JEE Main PYQs & Practice Questions

Atomic Physics is a Physics chapter in the JEE Main syllabus. This page brings together 109 previous-year and practice questions on Atomic Physics, organised into 5 topics: Thomson and Rutherford Models, Bohr's Model, Energy Levels and Spectral Series, Hydrogen-like Atoms and X-Rays. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Atomic Physics JEE Main PYQs as a free PDF (with answer key)

Revise this chapter: Revision notes · Formula sheet

Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Thomson and Rutherford Models

• 7.9MeVα-particle scatters from a target material of atomic number 79 . From the given…
• If an alpha particle with energy 7.7 MeV is bombarded on a thin gold foil, the closest…
• In an alpha particle scattering experiment distance of closest approach for the α…
• Given below are two statements: Statement I : Most of the mass of the atom and all its…
• √d₁ and √d₂ are the impact parameters corresponding to scattering angles 60° and 90°…
• In Rutherford's alpha-particle scattering experiment, only a few alpha particles rebound…
• The graph which depicts the results of Rutherford gold foil experiment with α-particales…
• Choose the correct option from the following options given below :

Bohr's Model

• The momentum of an electron revolving in nᵗʰ orbit is given by : (Symbols have their…
• The radius of third stationary orbit of electron for Bohr's atom is R. The radius of…
• Hydrogen atom from excited state comes to the ground state by emitting a photon of…
• Considering the Bohr model of hydrogen like atoms, the ratio of the radius of 5ᵗʰ orbit…
• An electron in the ground state of the hydrogen atom has the orbital radius of 5.3 ×…
• In Franck-Hertz experiment, the first dip in the current-voltage graph for hydrogen is…
• The ratio of momentum of the photons of the 1ˢᵗ and 2ⁿᵈ line of Balmer series of…
• The recoil speed of a hydrogen atom after it emits a photon in going from n = 5 state to…
• According to Bohr atomic model, in which of the following transitions will the frequency…
• In Bohr's atomic model of hydrogen, let K, P and E are the kinetic energy, potential…
• Considering Bohr's atomic model for hydrogen atom : (A) the energy of H atom in ground…
• Given below are two statements : Statement I : In hydrogen atom, the frequency of…
• Assuming the validity of Bohr's atomic model for hydrogen like ions the radius of Li⁺⁺…
• When a hydrogen atom going from n=2 to n=1 emits a photon, its recoil speed is x/5 m /…
• The ratio for the speed of the electron in the 3ʳᵈ orbit of He⁺ to the speed of the…
• If an electron is moving in the nᵗʰ orbit of the hydrogen atom, then its velocity (vₙ)…
• The frequency of revolution of the electron in Bohr's orbit varies with n , the…
• In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a…
• The time period of revolution of electron in its ground state orbit in a hydrogen atom…
• In hydrogen atom spectrum, ( R→ Rydberg's constant) A. the maximum wavelength of the…

Energy Levels and Spectral Series

• Find the ratio of energies of photons produced due to transition of an electron of…
• If 917 Aᵒ be the lowest wavelength of Lyman series then the lowest wavelength of Balmer…
• A particular hydrogen-like ion emits the radiation of frequency 3 × 10¹⁵ Hz when it…
• If the wavelength of the first member of Lyman series of hydrogen is λ. The wavelength…
• The first member of the Balmer series of hydrogen atom has a wavelength of 6561 Å. The…
• X different wavelengths may be observed in the spectrum from a hydrogen sample if the…
• An atom absorbs a photon of wavelength 500 nm and emits another photon of wavelength 600…
• A monochromatic light is incident on a hydrogen sample in ground state. Hydrogen atoms…
• The shortest wavelength of the spectral lines in the Lyman series of hydrogen spectrum…
• During the transition of electron from state A to state C of a Bohr atom, the wavelength…
• If λ₁ and λ₂ are the wavelengths of the third member of Lyman and first member of the…
• The longest wavelength associated with Paschen series is : (Given R_H=1.097 × 10⁷ SI unit)
• The wavelength of the radiation emitted is λ₀ when an electron jumps from the second…
• The energy levels of an hydrogen atom are shown below. The transition corresponding to…
• For a hydrogen atom, the ratio of the largest wavelength of Lyman series to that of the…
• Hydrogen atom is bombarded with electrons accelerated through a potential difference of…
• The ratio of the shortest wavelength of Balmer series to the shortest wavelength of…
• If Rydberg's constant is R, the longest wavelength of radiation in Paschen series will…
• The atomic hydrogen emits a line spectrum consisting of various series. Which series of…
• In the hydrogen spectrum, λ be the wavelength of first transition line of Lyman series…

Hydrogen-like Atoms

• A beam of monochromatic light is used to excite the electron in Li + + from the first…
• If the binding energy of ground state electron in a hydrogen atom is 13.6 eV, then, the…
• A particular hydrogen like ion emits radiation of frequency 2.92 × 10¹⁵ Hz when it makes…
• The radius of fifth orbit of the Li⁺⁺ is __________ × 10⁻¹² m. Take: radius of hydrogen…
• The radius of 2ⁿᵈ orbit of He⁺ of Bohr's model is r₁ and that of fourth orbit of Be³⁺ is…
• In a hydrogen like ion, the energy difference between the 2ⁿᵈ excitation energy state…
• The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs…
• An electron of a hydrogen like atom, having Z=4, jumps from 4ᵗʰ energy state to 2ⁿᵈ…
• Imagine that the electron in a hydrogen atom is replaced by a muon (μ). The mass of muon…
• Which level of the single ionized carbon has the same energy as the ground state energy…
• The energy of He⁺ ion in its first excited state is, (The ground state energy for the…

X-Rays

• The waves emitted when a metal target is bombarded with high energy electrons are
• An X-ray tube is operated at 1.24 million volt. The shortest wavelength of the produced…
• The K α X-ray of molybdenum has wavelength 0.071 nm. If the energy of a molybdenum atoms…

More Physics chapters

• Basic Mathematics for Physics
• Units, Dimensions & Errors
• Rectilinear Motion
• Vectors
• Projectile Motion & Relative Motion
• Newton's Laws of Motion
• Friction
• Circular Motion
• Work, Energy & Power
• Centre of Mass & Linear Momentum
• Collision
• Rotational Motion
• Gravitation
• Simple Harmonic Motion
• Elasticity
• Fluid Mechanics
• Surface Tension
• Thermometry & Calorimetry
• Kinetic Theory of Gases
• Thermodynamics
• Heat Transfer
• Mechanical Waves
• Sound Waves
• Experimental Skills
• Electrostatics I — Charges, Field & Gauss's Law
• Electrostatics II — Potential & Capacitance
• Current Electricity
• Moving Charges & Magnetism
• Magnetism & Matter
• Electromagnetic Induction
• Alternating Current
• Electromagnetic Waves
• Ray Optics
• Wave Optics
• Dual Nature of Radiation & Matter
• Nuclear Physics
• Semiconductors & Electronic Devices
• Communication Systems

Frequently asked questions

How many Atomic Physics questions are there for JEE Main?

PrepWiser has 109 Atomic Physics questions for JEE Main, grouped into 5 topics such as Thomson and Rutherford Models, Bohr's Model and Energy Levels and Spectral Series.

Are these Atomic Physics questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Atomic Physics questions?

Open any Atomic Physics question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.