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Physics - Nuclear Physics

Practise 97 NTA Abhyas (JEE Main) questions on Nuclear Physics. Each question shows a quick preview so you can jump straight to the topic you want to revise.

Nuclear Physics has been asked in 0 of the 25 years of NTA Abhyas (JEE Main) papers analysed (2002–2026), with 97 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. 1The energy spectrum of β - p a r t i c l e s [number N E as a function of β - energy E ] emitted from a radioactive source is
  2. 2In a sample initially, there are an equal number of atoms of two radioactive isotopes A and B . 3 days later, the number of atoms of A is tw
  3. 3A and B are two radioactive substances whose half-lives are 1 and 2 years respectively. Initially, 10 g of A and, 1 g of B is taken. The tim
  4. 4Some amount of a radioactive substance (half-life = 10 days) is spread inside a room and consequently, the level of radiation becomes 50 tim
  5. 5A nucleus of mass 20 u emits a γ -photon of 6 M e V . If the emission assume to occur when nucleus is free and rest, then the nucleus will h
  6. 6How long will a radioactive isotope, whose half-life is T years, take for its activity to reduce to 1 8 th of its initial value?
  7. 7The mean lives of a radioactive substance are 1620 years and 405 years for α and β emission respectively. If it is decaying by both α and β
  8. 8Two radioactive nuclei P and Q , in a given sample decay into a stable nucleus R . At time t = 0 , the number of P species are 4 N 0 and tha
  9. 9The binding energy per nucleon of deuteron ( H ) 1 2 and helium nucleus ( H e ) 2 4 is 1.1 MeV and 7 MeV respectively. If two deuteron nucle
  10. 10There is a stream of neutrons with a kinetic energy of 0 . 0327 eV . If the half-life of the neutron is 700 second, what fraction of neutron
  11. 11In radioactive reaction Z A X → Z + 1 A X 1 → Z + 2 A X 2 → Z A - 4 X 3 → Z + 1 A - 4 X 4 Successive emission of particles is
  12. 12Li 7 fuses with a proton according to the nuclear reaction given below: p + 7 L i 4 H e + 4 H e Given that the atomic masses of 1 H , 4 He a
  13. 13Two radioactive nuclei P and Q , in a given sample decay into a stable nucleus R . At time t = 0 , the number of P species are 4 N 0 and tha
  14. 14A nucleus of mass M + m is at rest and decays into two daughter nuclei of equal mass M 2 each. Speed of light is c. The speed of daughter nu
  15. 15The half-life of a radioactive isotope X is 50 years. It decays to another element Y which is stable. The two elements X and Y were found to
  16. 16The half-life of a radioactive nuclide is 20 h . It is found that the fraction ( 1 x ) of original activity remains after 40 hours ? What is
  17. 17Two radioactive materials X 1 a n d X 2 have decay constants 10 λ a n d λ respectively. If initially, they have the same number of nuclei, t
  18. 18A radioactive material decays by simultaneous emission of two particles with half-lives 1620 years and 810 years respectively. The time in y
  19. 19A sample contains a large number of nuclei. The probability that a nucleus in the sample will decay after four half-lives is a b where a and
  20. 20A P 32 radionuclide with half-life T = 14 . 3 days is produced in a reactor at a constant rate q = 2 . 7 × 10 9 nuclei per second. How soon
  21. 21A piece of burnt wood of mass 20 g is found to have a 14 C activity of 4 decay s - 1 . How long has the tree that this wood belonged to be d
  22. 22There is a stream of neutrons with a kinetic energy of 0 . 0327 eV . If the half-life of the neutron is 700 second, what fraction of neutron
  23. 23A proton is bombarded on a stationary lithium nucleus. As a result of the collision two α -particles are produced. If the direction of motio
  24. 24How much U 235 is consumed in a day in an atomic power house operating at 400 M W , provided the whole of the mass of U 235 is converted int
  25. 25When 90 Th 228 transforms to 83 Bi 212 , then the number to the emitted and -particles are, respectively
  26. 2680 kg of a radioactive material reduces to 10 kg in 1 h . The decay constant of the material is
  27. 27The rate of disintegration of a radioactive substance falls from 40 3 dps to 5 3 dps in 6 hours. The half-life of the radioactive substance
  28. 28A nucleus of mass M + ∆ m is at rest and decays into two daughter nuclei of mass M 2 each. If the speed of light is c , then the speed of an
  29. 29Find the decay constant (in s 1 ) of Co 55 radionuclide if its activity is known to decrease 4 % per hour. The decay product is non-radioact
  30. 30The binding energy per nucleon of deuterium and helium nuclei are 1 . 1 MeV and 7 . 0 MeV respectively. When two deuterium nuclei fuse toget
  31. 31The β - activity of a sample of C O 2 prepared from a contemporary wood gave a count rate of 25.5 counts per minute ( cpm ) . The same mass
  32. 32When 92 U 235 is bombarded with one neutron, fission occurs and the products are three neutrons, 36 K r 94 , and
  33. 33The particle A is converted into C via the following reaction. A → B + 2 H e 4 B → C + 2 e - Then
  34. 34A U 238 nucleus originally at rest, decays by emitting an alpha particle having a speed u . Due to this emission, the residual nucleus recoi
  35. 35A block having 12 g of an element is placed in a room. This element is a radioactive element with a half-life of 15 years. After how many ye
  36. 36C 14 has half-life 5700 year . At the end of 11400 years , the actual amount left is
  37. 37A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr respectively. The time in year af
  38. 38M p denotes the mass of a proton and M n that of a neutron. A given nucleus, of binding energy B , contains Z protons and N neutrons. The ma
  39. 39A radioactive sample S 1 having the activity A 1 has twice the number of nuclei as another sample S 2 of activity A 2 . If A 2 = 2 A 1 , the
  40. 40For a radioactive sample, the initial activity of the material was 8 counts and after 3 h it becomes 1 count,.The half-life of the sample is
  41. 41A heavy nucleus having mass number 200 gets disintegrated into smaller fragments of mass number 80 and 120 . If binding energy per nucleon f
  42. 42The value of binding energy per nucleon of 20 40 Ca nucleus is Given: Mass of 20 40 Ca nucleus = 39.962589 u Mass of proton = 1.007825 u Mas
  43. 43The radioactivity isotope X with a half-life of 10 9 year decays to Y which is stable. A sample of rocks was found to contain both the eleme
  44. 44In a nuclear fission, when a mass of 0 . 5 g of uranium is consumed, the energy obtained in kWh is n × 10 7 . Find the value of n .
  45. 45If the radius of the 1 3 2 7 Al nucleus is estimated to be 3 . 6 Fermi, then the radius of 5 2 1 2 5 Te nucleus be nearly :
  46. 46Two nuclei have mass numbers in the ratio 8 : 125 . The ratio of their nuclear radii is:
  47. 47Assume that the nuclear binding energy per nucleon ( B A ) versus mass number ( A ) is as shown in the figure. Use this plot to choose the c
  48. 48For a radioactive sample, the initial activity of the material was 8 cps and after 3 h it becomes 1 cps. The half-life of the sample is
  49. 49A Li 7 target is bombarded with a proton beam current of magnitude 10 - 4 A for an hour to produce Be 7 of activity 1 . 8 × 10 8 disintegrat
  50. 50A radionuclide with half-life 1620 s is produced in a reactor at a constant rate of 1000 nuclei per second. During each decay energy, 200 Me

Frequently Asked Questions

1.How many questions are available for Nuclear Physics?

This chapter includes 97 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 Nuclear 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 Nuclear Physics questions in NTA Abhyas (JEE Main)?

Of the 97 questions analysed for this chapter, 100% are easy, 0% moderate and 0% tough. 2026 had the most, with 0 questions.

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

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