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Physics - Atomic Physics

Practise 104 NTA Abhyas (JEE Main) questions on Atomic Physics. Each question shows a quick preview so you can jump straight to the topic you want to revise.

Atomic Physics has been asked in 0 of the 25 years of NTA Abhyas (JEE Main) papers analysed (2002–2026), with 104 questions in all. 100% of them were easy, 0% moderate and 0% tough. Most of its questions came from 2026, with 0 questions that year. In the last three years (2024–2026) it had 0 questions across 49 papers, about 0 per paper.

All of the chapter's questions come from a single topic, Uncategorized.

  1. 1In a hydrogen-like species, the net force acting on a revolving electron in an orbit as given by the Bohr model is proportional to [ n → pri
  2. 2Find the closest integer wavelength value of K α line (in picometer) in copper (Z = 29) if the wavelength of K α = line in iron (Z = 26) is
  3. 3Wavelengths belonging to Balmer series lying in the range of 450 nm to 750 nm were used to eject photoelectrons from a metal surface whose w
  4. 4The K α line obtained for molybdenum ( Z = 42 ) is 0.71 A ∘ . Then, the wavelength of the K α line of copper ( Z = 29 ) is
  5. 5If the first excitation energy of a hydrogen-like atom is 27 . 3 eV , then the ionization energy of this atom will be
  6. 6According to Bohr's model, the minimum energy (in eV ) required to remove an electron from the ground state of a doubly ionized Li atom Z =
  7. 7The circumference of the second orbit of an atom or ion having a single electron is 4 × 10 - 9 m . The de Broglie wavelength of an electron
  8. 8A hydrogen-like neutral species in some excited state A , on absorbing a photon of energy 3 . 066 eV get excited to a new state B . When the
  9. 9A travelling nucleus A having a de-Broglie wavelength A spontaneously splits into two nuclei B and C of equal masses. After the split, B tra
  10. 10K α wavelength emitted by an atom of atomic number Z = 11 is λ . Find the atomic number for an atom that emits K α radiation with wavelength
  11. 11In a hypothetical hydrogen like atom, if transition of electron from n = 4 to n = 3 produces visible light, then the possible transition to
  12. 12The radiation corresponding to the transitions of electrons from n = 2 to n = 1 of hydrogen atoms, fall on He + ions which are in n = 1 and
  13. 13Find the atomic number for an atom that emits K α radiation with wavelength 4 λ , if K α wavelength emitted by an atom of atomic number Z =
  14. 14If an electron in a hydrogen atom is in its 2 nd excited state, orbiting the nucleus in a stationary orbit of radius 4 . 65 A , then its de-
  15. 15In a Coolidge tube, the potential difference used to accelerate the electron is increased from 24 . 8 kV to 49 . 6 kV . As a result, the dif
  16. 16The ratio of minimum wavelengths of Lyman and Balmer series will be
  17. 17The wavelength of a photon and de-Broglie wavelength an electron have the same value. Given that v is the speed of electron and c is the vel
  18. 18The radius of the first orbit of hydrogen is r H , and the energy in the ground state is - 13.6 eV . Considering a μ - - particle with a mas
  19. 19Total number of elements which are present in a row on the periodic table between those elements, whose wavelength of K α lines are equal to
  20. 20The angular momentum of an electron in Bohr's hydrogen atom whose energy is - 3.4 eV, is
  21. 21If λ is the wavelength of hydrogen atom from the transition n =3 to n =1, then what is the wavelength for doubly ionised lithium ion for sam
  22. 22If the series limit wavelength of the Lyman series of hydrogen atom is 912 Å , then the series limit wavelength of the Balmer series of the
  23. 23Assuming f to be the frequency of the electromagnetic wave corresponding to the first line in Balmer series, the frequency of the immediate
  24. 24For sodium light, the two yellow lines occur at λ 1 and λ 2 wavelengths. If the mean of these two is 6000 A ∘ and λ 2 - λ 1 = 6 A ∘ , then t
  25. 25When an electron jumps from a level n = 4 to n = 1 , momentum of the recoiled hydrogen atom will be
  26. 26If the series limit wavelength of the Lyman series of hydrogen atom is 912 Å , then the series limit wavelength of the Balmer series of the
  27. 27When the momentum of a photon is chagned by an amount p ' then the corresponding change in the de-Broglie wavelength is found to be 0 . 2 %
  28. 28The energy of an electron in n th orbit of hydrogen atom is - 13.6 n ⁡ 2 eV. ⁡ Energy required to excite the electron from the first orbit t
  29. 29The wavelength of the first spectral line in the Balmer series of the hydrogen atom is 6561 A ∘ . The wavelength of the second spectral line
  30. 30The probability that a particular nucleus of 38 Cl will undergo beta decay in any time interval of 4 s is T 1 / 2 f o r 38 Cl i s 37 .2 min
  31. 31The shortest wavelength of the Brackett series of a hydrogen like atom (Atomic number = Z ) is the same as the shortest wavelength of the Ba
  32. 32An H atom and a L i + + ion are both in the second excited state. If l H and l Li are their respective electronic angular momenta and E H an
  33. 33The shortest wavelength in Lyman series is 91 .2 nm . The longest wavelength of the series is
  34. 34If r 1 represents the difference in radii of stationary orbits for n = 3 and n = 4 in a hydrogen atom and r 2 represents the difference in r
  35. 35A radioactive sample at some instant has a disintegration rate of 5000 disintegrations per minute. After 5 minutes, the rate becomes 1250 di
  36. 36A proton is fired from very far away towards a nucleus with charge Q = 120 e , where e is the electronic charge. It makes the closest approa
  37. 37Let λ α , λ β and λ α ′ denote the wavelengths of the X-rays of the K α , K β and L α lines in the characteristic X-rays for a metal. Then,
  38. 38In the spectrum of the hydrogen atom, the ratio of the wavelengths of the longest wavelength in L y m a n series to the longest wavelength i
  39. 39A stationary hydrogen atom in the first excited state emits a photon. If the mass of the hydrogen atom is m and its ionization energy is E ,
  40. 40An H -atom moving with speed v makes a head-on collision with another H -atom at rest. Both the atoms are in the ground state. The minimum v
  41. 41The velocity of the electrons liberated by electromagnetic radiation of wavelength = 18 . 0 nm , from stationary He + ions in the ground sta
  42. 42An electron of a stationary hydrogen atom (mass = m ) jumps from the fifth energy level to the ground level. As a result, the atom emits a p
  43. 43In the spectrum of hydrogen atom, the ratio of the longest wavelength in Lyman series to the longest wavelength in the Balmer series is
  44. 44For hydrogen atom electron in n th Bohr orbit, the ratio of the radius of orbit to its de-Broglie wavelength is
  45. 45If the wavelenth of K radiation emitted by an atom of atomic number Z = 41 is , then the atomic number for an atom that emits K radiation wi
  46. 46An electron in a hydrogen atom is in an orbit from which there can be a maximum of six transitions. Another electron in a different hydrogen
  47. 47An He + ion in the excited state, on the transition to the ground state, emits two photons in succession with wavelengths 108 . 5 and 30 . 4
  48. 48Energy levels A , B and C of a certain atom correspond to increasing values of energy, i.e. E A E B E C . If λ 1 , λ 2 and λ 3 are the wavel
  49. 49In the Coolidge tube experiment, if the applied voltage is increased to three times, the short wavelength limit of continuous X-ray spectrum
  50. 50Find the ratio of energies of photons produced due to the transition of an electron of a hydrogen atom from its (i) second permitted energy

Frequently Asked Questions

1.How many questions are available for Atomic Physics?

This chapter includes 104 NTA Abhyas (JEE Main) questions.

2.Are these questions only from NTA Abhyas (JEE Main), or from other exams too?

These are NTA Abhyas (JEE Main) questions specifically for the Atomic Physics chapter. Questions from other exams like JEE Main or JEE Advanced are organised separately under their respective exam sections.

3.What is the difficulty level of Atomic Physics questions in NTA Abhyas (JEE Main)?

Of the 104 questions analysed for this chapter, 100% are easy, 0% moderate and 0% tough. 2026 had the most, with 0 questions.

4.Which topics in Atomic Physics should I focus on?

All of this chapter's questions come from a single topic: Uncategorized.