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Physics - Atomic Physics

Practise 54 KCET previous year questions on Atomic Physics, compiled from papers spanning 2007 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KCET tests.

Atomic Physics has been asked in 20 of the 20 years of KCET papers analysed (2007–2026), with 54 questions in all. 52% of them were easy, 31% moderate and 17% tough. Most of its questions came from 2014, with 4 questions that year. In the last three years (2024–2026) it had 7 questions across 3 papers, about 2.3 per paper.

The chapter's 4 topics are not weighted equally: Bohr's Atomic Model (24 questions, 44%), Atomic Spectrum (18 questions, 33%), and Atomic Structure (10 questions, 19%) have been asked the most. Bohr's Atomic Model has also led over the last five years, with 10 questions. Bohr's Atomic Model has produced the most tough questions (5).

  1. 1The radius of first orbit in hydrogen atom is m. The kinetic energy , potential energy and total energy of electron in first orbit are2026Bohr's Atomic Model
  2. 2Bohr's second postulate implies quantisation of2026Bohr's Atomic Model
  3. 3An electron transition takes place from excited state to ground state in hydrogen atom, then2026Bohr's Atomic Model
  4. 4If the radius of first Bohr orbit is , then the radius of the second Bohr orbit will be2025Bohr's Atomic Model
  5. 5In alpha particle scattering experiment, if is the initial velocity of the particle, then the distance of closest approach is . If the veloc2024Atomic Structure
  6. 6The ratio of area of first excited state to ground state of orbit of hydrogen atom'is2024Bohr's Atomic Model
  7. 7The ratio of volume of nucleus to its surfactarea is (Given, )2024Bohr's Atomic Model
  8. 8In the Rutherford's alpha scattering experiment, as the impact parameter increases, the scattering angle of the alpha particle.2023Atomic Structure
  9. 9Three energy levels of hydrogen atom and the corresponding wavelength of the emitted radiation due to different electron transition are as s2023Bohr's Atomic Model
  10. 10The radius of hydrogen atom in the ground state is . After collision with an electron, it is found to have a radius of , the principal quant2022Bohr's Atomic Model
  11. 11In accordance with the Bohr's model, the quantum number that characterises the Earth's revolution around the Sun in an orbit of radius with 2022Bohr's Atomic Model
  12. 12If an electron is revolving in its Bohr orbit having Bohr radius of , then the radius of third orbit is2022Bohr's Atomic Model
  13. 13Energy of an electron in the second orbit of hydrogen atom is . The energy of electron in the third orbit of will be2021Bohr's Atomic Model
  14. 14An electron in an excited state of ion has angular momentum . The de-Broglie wavelength of electron in this state is (where, Bohr radius ). 2021Bohr's Atomic Model
  15. 15The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is2020Bohr's Atomic Model
  16. 16The period of revolution of an electron revolving in nth orbit of H-atom is proportional to2020Bohr's Atomic Model
  17. 17A beam of fast moving alpha particles were directed towards a thin film of gold. The parts and of the transmitted and reflected beams corres2020Atomic Structure
  18. 18In Rutherford experiment, for head-on collision of a-particles with a gold nucleus, the impact parameter is2019Atomic Structure
  19. 19Frequency of revolution of an electron revolving in nth orbit of H-atom is proportional to2019Bohr's Atomic Model
  20. 20A hydrogen atom in ground state absorbs \( 10.2 {eV} \) of energy. The orbital angular momentum of the electron is increased by2019Bohr's Atomic Model
  21. 21The total energy of an electron revolving in the second orbit of hydrogen atom is2018Bohr's Atomic Model
  22. 22The period of revolution of an electron in the ground state of hydrogen atom is \( T \). The period of revolution of the electron in the fir2018Bohr's Atomic Model
  23. 23A particle is dropped from a height ' \( H \) '. The de Broglie wavelength of the particle depends on height as2017Bohr's Atomic Model
  24. 24When electron jumps from \( n=4 \) level to \( n=1 \) level, the angular momentum of electron changes by2016Atomic Models
  25. 25What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum, (take hc \( =1240 {eV} 2015Atomic Structure
  26. 26The given truth table is for2015Atomic Spectrum
  27. 27The waves used for line-of-sight (LOS) communication is2015Atomic Spectrum
  28. 28Diameter of the objective of a telescope is \( 200 {~cm} \). What is the resolving power of a telescope \( ? \) Take wavelength of light \( 2014Atomic Spectrum
  29. 29A polarized light of intensity \( I_{0} \) is passed through another polarizer whose pass axis makes an angle of \( 60^{ } \) with the pass 2014Bohr's Atomic Model
  30. 30The relation between half life \( (T) \) and decay constant \( ( ) \) is2014Atomic Models
  31. 31In a potentiometer experiment of a cell of emf \( 1.25 {~V} \) gives balancing length of \( 30 {~cm} \). If the cell is replaced by another 2014Atomic Structure
  32. 32Pick out the correct statement from the following2013Atomic Spectrum
  33. 33The figure shows the energy level of certain atom. When the electron de excites from to , an electromagentic wave of wavelength is emitted. 2013Bohr's Atomic Model
  34. 34Which of the following is not made by quarks?2013Atomic Structure
  35. 35Spectrum of sunlight is an example for2012Atomic Spectrum
  36. 36In hydrogen atom, electron excites from ground state to higher energy state and its orbital velocity is reduced to rd of its initial value. 2012Bohr's Atomic Model
  37. 37The ratio of the magnetic dipole moment to the angular momentum of the electron in the 1st orbit of hydrogen atom is2012Atomic Structure
  38. 38If is the orbit number of the electron in a hydrogen atom, the correct statement among the following is2012Bohr's Atomic Model
  39. 39Flash spectrum confirms a/an\2011Atomic Spectrum
  40. 40Rutherford's atomic model could account for2011Atomic Structure
  41. 41When an electron jumps from the orbit to , then wavelength of the radiations absorbed will be ( is Rydberg's constant)2011Atomic Spectrum
  42. 42The ratio of minimum wavelengths of Lyman and Balmer series will be2011Atomic Spectrum
  43. 43The spectrum of an oil flame is an example for2010Atomic Spectrum
  44. 44An electron is moving in an orbit of a hydrogen atom from which there can be a maximum of six transition. An electron is moving in an orbit 2010Bohr's Atomic Model
  45. 45is the frequency of the series limit of Lyman series, is the frequency of the first line of Lyman series and is the frequency of the series 2010Atomic Spectrum
  46. 46The spectral series of the hydrogen atom that lies in the visible region of the electromagnetic spectrum2009Atomic Spectrum
  47. 47Continuous emission spectrum is produced by2009Atomic Spectrum
  48. 48Hydrogen atom from excited state comes to the ground stage by emitting a photon of wavelength . If is the Rydberg constant, the principal qu2009Atomic Spectrum
  49. 49Solar spectrum is an example for2008Atomic Spectrum
  50. 50The ratio of minimum wavelengths of Lyman and Balmer series will be2008Atomic Spectrum

Frequently Asked Questions

1.How many questions are available for Atomic Physics?

This chapter includes 54 questions compiled from KCET papers spanning 2007 to 2026.

2.Are these questions only from KCET, or from other exams too?

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

3.Is Atomic Physics an important chapter for KCET Physics?

Atomic Physics has appeared in 20 of the 20 years of KCET papers covered here, with 54 questions across 20 papers - about 3 per paper it appears in.

4.What is the difficulty level of Atomic Physics questions in KCET?

Of the 54 questions analysed for this chapter, 52% are easy, 31% moderate and 17% tough. 2014 had the most, with 4 questions.

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

These topics have carried the most weightage in Atomic Physics:

  • Bohr's Atomic Model - 24 questions (44%)
  • Atomic Spectrum - 18 questions (33%)
  • Atomic Structure - 10 questions (19%)
  • Bohr's Atomic Model has produced the most tough questions (5).
6.Is Atomic Physics's weightage in KCET going up or down?

Across all 20 papers analysed, Atomic Physics has averaged about 2.7 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 2.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.