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Physics - Nuclear Physics

Practise 50 MHTCET previous year questions on Nuclear 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 MHTCET tests.

Nuclear Physics has been asked in 10 of the 17 years of MHTCET papers analysed (2007–2026), with 50 questions in all. 40% of them were easy, 56% moderate and 4% tough. Most of its questions came from 2025, with 10 questions that year. In the last three years (2024–2026) it had 25 questions across 59 papers, about 0.4 per paper.

The chapter's 4 topics are not weighted equally: Radioactivity (40 questions, 80%), Nuclear structure (6 questions, 12%), and Nuclear energy (2 questions, 4%) have been asked the most. Radioactivity has also led over the last five years, with 29 questions. Radioactivity has produced the most tough questions (1).

  1. 1Activity of a radioactive sample decreases to of its original value in 4 days. Then in 16 days its activity will become times the original v20 Apr, 2026 (E)Radioactivity
  2. 2A radioactive sample has half-life of years. The percentage of fraction decayed in years will be19 Apr, 2026 (M)Radioactivity
  3. 3A radioactive element has rate of disintegration disintegrations per minute at a particular instant. After four minutes, it becomes disinteg19 Apr, 2026 (E)Radioactivity
  4. 4Two samples A and B contain equal amount of radioactive substances. If of sample A and of sample B, remain after 9 hours, then the ratio of 18 Apr, 2026 (E)Radioactivity
  5. 5The half-life of the isotope is 15 hr. How much time does it take for of a sample of this isotope to decay ?17 Apr, 2026 (M)Radioactivity
  6. 6The activity of a radioactive sample is measured as counts per minute at time and counts per minute at time minute. The time (in minute) in 17 Apr, 2026 (E)Radioactivity
  7. 7The ratio of the density of oxygen nucleus and helium nucleus is16 Apr, 2026 (E)Nuclear structure
  8. 8Two different radioactive elements with half lives and have undecayed atoms and respectively, present at a given instant. The ratio of their15 Apr, 2026 (M)Radioactivity
  9. 9A radioactive element having half-life 30 min . is undergoing beta decay. The fraction of radioactive element remains undecayed after 90 min05 May, 2025 (E)Radioactivity
  10. 10Two radioactive materials ' and ' have decay constants ' ' and ' ' respectively. Initially they have the same number of nuclei. The ratio of27 Apr, 2025 (E)Radioactivity
  11. 11A radio active element has rate of disintegration 8000 disintegrations per minute at a particular instant. After four minutes it becomes 20026 Apr, 2025 (E)Radioactivity
  12. 12A radioactive element has rate of disintegration 9000 disintegration per minute at a particular instant. After two minutes it becomes 3000 d25 Apr, 2025 (M)Radioactivity
  13. 13The activity of radioactive sample is measured as counts per minute at time , and counts per minute at time minute, The activity reduces to 23 Apr, 2025 (M)Radioactivity
  14. 14A radioactive element emits two particles, one electron and two positrons. The product nucleus is represented by . The value of P is23 Apr, 2025 (E)Radioactivity
  15. 15is converted into by emission of alpha and beta particles. The number of alpha and beta particles emitted are respectively22 Apr, 2025 (M)Radioactivity
  16. 16A radioactive element A decays into radioactive element C by the following processes in succession. Then elements22 Apr, 2025 (E)Nuclear structure
  17. 17Two radioactive materials A and B having decay constant '7 ' and ' ' respectively, initially have same number of nuclei. The time taken to h21 Apr, 2025 (M)Radioactivity
  18. 18For the following reaction, the particle ' ' is20 Apr, 2025 (M)Radioactivity
  19. 19In is the mass of an oxygen isotope and and are the mass of proton and mass of neutron respectively, then the nucleus binding energy of the 16 May, 2024 (M)Nuclear energy
  20. 20Two radioactive substances and have decay constants ' ' and ' ' respectively. At , they have the same number of nuclei. The ratio of number 16 May, 2024 (E)Radioactivity
  21. 21A radioactive substance has half-life of 60 minute. During 3 hour, the amount of substance decayed would be15 May, 2024 (M)Radioactivity
  22. 22In the given reaction radioactive radiations are emitted in the sequence15 May, 2024 (E)Radioactivity
  23. 23If ' ' is the half life of a radioactive substancethen its instantaneous rate of change of activity is proportional to11 May, 2024 (M)Radioactivity
  24. 24Half-lives of two radioactive elements and are 30 minute and 60 minute respectively. Initially the samples have equal number of nuclei. Afte04 May, 2024 (E)Radioactivity
  25. 25In the uranium radioactive series, the initial nucleus is and that the final nucleus is . When uranium nucleus decays into lead, the number 03 May, 2024 (M)Nuclear reactions
  26. 26Half life of radio-active element is 1600 years. The fraction of sample remains undecayed after 6400 years will be14 May, 2023 (E)Radioactivity
  27. 27A radioactive sample has half-life of 5 years. The percentage of fraction decayed in 10 years will be13 May, 2023 (M)Radioactivity
  28. 28An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following particles.13 May, 2023 (M)Radioactivity
  29. 29Two different radioactive elements with half lives ' ' and ' ' have undecayed atoms ' ' and ' ' respectively present at a given instant. The12 May, 2023 (E)Radioactivity
  30. 30In a radioactive disintegration, the ratio of initial number of atoms to the number of atoms present at time is decay constant11 May, 2023 (M)Radioactivity
  31. 31Activity of a radioactive sample decreases to of its original value in 3 days. Then in 9 days its activity reduces to11 Aug, 2022 (M)Radioactivity
  32. 32The half of a radioactive substance is 25 minutes The time between decay and decay of the substance will be07 Aug, 2022 (E)Radioactivity
  33. 33For a substance, fraction of its initial quantify which will disintegrate in its average life time is about05 Aug, 2022 (E)Radioactivity
  34. 34The half-life of a radioactive substance is 30 minutes. The time taken between decay and decay of the same radioactive substance is24 Sep, 2021 (E)Radioactivity
  35. 35A nucleus breaks into two nuclear parts, which have their velocity ratio . The ratio of their nuclear radii will be22 Sep, 2021 (M)Nuclear structure
  36. 36Two radioactive materials and have decay constants ' ' and ' ' respectively. Initially, they have the same number of nuclei. After time ' ',22 Sep, 2021 (E)Radioactivity
  37. 37A sample of radioactive element contains active nuclei. The halt-life of the element is 15 days. The number of nuclei decayed after 60 days 20 Sep, 2021 (M)Radioactivity
  38. 38Two different radioactive elements with half-lives ' ' and ' ' have undecayed atoms ' and respectively, present at a given instant. The rati20 Oct, 2020 (M)Radioactivity
  39. 39A shell of mass 'M' initially at rest suddenly explodes in three fragments. Two of these fragments are of mass 'M ' each, which move with ve19 Oct, 2020 (M)Nuclear reactions
  40. 40An ' ' particle of energy is moving in a circular path in uniform magnetic field. The energy of proton moving in the same path and same magn16 Oct, 2020 (E)Radioactivity
  41. 41A radioactive nucleus emits particles and particles in succession. The ratio of number of neutrons to that of protons is mass number, atomic16 Oct, 2020 (E)Radioactivity
  42. 42The variation of decay rate with number of active nuclei is correctly shown in graph12 Oct, 2020 (M)Radioactivity
  43. 43If is the half-life of a radioactive substance then its instantaneous rate of change of activity is proportional to12 Oct, 2020 (E)Radioactivity
  44. 44A radioactive element has a rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2017Radioactivity
  45. 45In radioactive decay process, the negatively charged emitted -particles are2008Radioactivity
  46. 46If is the mass of an oxygen isotope , and are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope 2008Nuclear energy
  47. 47Two nuclei have their mass numbers in the ratio of . The ratio of their nuclear densities would be2008Nuclear structure
  48. 48A particle having almost zero mass and exactly zero charge is2008Nuclear structure
  49. 49The momentum of a photon of energy in , will be2007Nuclear structure
  50. 50and are masses of proton and neutron respectively. An element of mass has protons and neutrons then2007Radioactivity

Frequently Asked Questions

1.How many questions are available for Nuclear Physics?

This chapter includes 50 questions compiled from MHTCET papers spanning 2007 to 2026.

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

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

3.Is Nuclear Physics an important chapter for MHTCET Physics?

Nuclear Physics has appeared in 10 of the 17 years of MHTCET papers covered here, with 50 questions across 44 papers - about one per paper it appears in.

4.What is the difficulty level of Nuclear Physics questions in MHTCET?

Of the 50 questions analysed for this chapter, 40% are easy, 56% moderate and 4% tough. 2025 had the most, with 10 questions.

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

These topics have carried the most weightage in Nuclear Physics:

  • Radioactivity - 40 questions (80%)
  • Nuclear structure - 6 questions (12%)
  • Nuclear energy - 2 questions (4%)
  • Radioactivity has produced the most tough questions (1).
6.Is Nuclear Physics's weightage in MHTCET going up or down?

Across all 44 papers analysed, Nuclear Physics has averaged about 1.1 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.