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Nuclear Physics Questions

Practice 40 Nuclear Physics questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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40
Total Questions
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4
Easy
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34
Medium
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2
Hard
Practice by Exam:Physics(38)General Knowledge(2)

About nuclear physics — practice questions, PYQs & concepts

nuclear physics is a frequently-tested topic on Physics, General Knowledge. ExamTest.live currently lists 40 nuclear physics questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

nuclear physics weight in competitive exams

Across our nuclear physics question bank, the largest sources are Physics (38) and General Knowledge (2). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 4 easy nuclear physics questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
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All Nuclear Physics Questions(1–40 of 40)

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Q1mediummcqPhysicsAIEEE 20042026
0% accuracy
The binding energy per nucleon of deuteron () and helium nucleus () is and respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is:
Q2mediummcqGeneral KnowledgeCompetitive Exam2026
0% accuracy
Which of the following countries was the first to achieve controlled nuclear fusion in a laboratory setting?
Q3mediummcqPhysicsAIEEE 20062026
0% accuracy
The energy spectrum of -particles [number as a function of -energy ] emitted from a radioactive source is:
image
Q4easymcqPhysicsAIEEE 20062026
0% accuracy
When nuclei are bombarded by protons, and the resultant nuclei are , the emitted particles will be:
Q5easymcqPhysicsAIEEE 20062026
0% accuracy
The 'rad' is the correct unit used to report the measurement of:
Q6mediummcqPhysicsAIEEE 20062026
0% accuracy
If the binding energy per nucleon in and nuclei are and respectively, then in the reaction , the energy released is:
Q7mediummcqPhysicsAIEEE 20072026
100% accuracy
If 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 is:
Q8mediummcqPhysicsAIEEE 20072026
100% accuracy
In gamma ray emission from a nucleus:
Q9mediummcqPhysicsAIEEE 20072026
100% accuracy
The half-life period of a radioactive element is same as the mean lifetime of another radioactive element . Initially they have the same number of atoms. Then:
Q10mediummcqPhysicsAIEEE2026
Statement - 1: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion.Statement - 2: For heavy nuclei, binding energy per nucleon increases with increasing while for light nuclei it decreases with increasing .
Q11mediummcqPhysicsAIEEE 20092026
image
The above is a plot of binding energy per nucleon , against the nuclear mass ; correspond to different nuclei. Consider four reactions:(i) (ii) (iii) (iv) where is the energy released. In which reactions is positive?
Q12mediummcqPhysicsAIEEE2026
A nucleus of mass is at rest and decays into two daughter nuclei of equal mass each. Speed of light is . If the binding energy per nucleon for the parent nucleus is and that for the daughter nuclei is , then:
Q13mediummcqPhysicsAIEEE2026
A nucleus of mass is at rest and decays into two daughter nuclei of equal mass each. The speed of daughter nuclei is:
Q14mediummcqPhysicsAIEEE2026
A radioactive nucleus (initial mass number and atomic number ) emits -particles and positrons. The ratio of number of neutrons to that of protons in the final nucleus will be:
Q15mediummcqPhysicsAIEEE 20122026
Assume that a neutron breaks into a proton and an electron. The energy released during this process is:(Mass of neutron ; mass of proton ; mass of electron )
Q16mediummcqGeneral KnowledgeCompetitive Exam2026
The International Thermonuclear Experimental Reactor (ITER) project aims to demonstrate the feasibility of:
Q17mediummcqPhysicsNEET (UG) 20242026
In the nuclear emission sequence:
image
The mass number and atomic number of the product respectively, are:
Q18mediummcqPhysicsAIEEE2026
If radius of nucleus is estimated to be then the radius nucleus be nearly:
Q19mediummcqPhysicsAIEEE2026
Starting with a sample of pure , of it decays into in . The corresponding half-life is:
Q20mediummcqPhysicsAIEEE2026
The intensity of gamma radiation from a given source is . On passing through of lead, it is reduced to . The thickness of lead which will reduce the intensity to will be:
Q21mediummcqPhysicsNEET 20222026
A nucleus of mass number splits into two nuclei having mass number and . The ratio of radius of two daughter nuclei respectively is:
Q22mediummcqPhysicsNEET 20222026
In the given nuclear reaction, the element is:
Q23mediummcqPhysicsNEET 20212026
A radioactive nucleus undergoes spontaneous decay in the sequence:

The possible decay particles in the sequence are:
Q24mediummcqPhysicsNEET 20172026
Radioactive material ' ' has decay constant ' ' and material ' ' has decay constant ' '. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material ' ' to that of ' ' will be ?
Q25mediummcqPhysicsPhysics
0% accuracy
Fission of nuclei is possible because the binding energy per nucleon in them :
Q26mediummcqPhysicsPhysics
0% accuracy
The nuclei of which one of the following pairs of nuclei are isotones ?
Q27mediummcqPhysicsPhysics
0% accuracy
In any fission process the ratio (mass of fission products/mass of parent nucleus) is :
Q28mediummcqPhysicsPhysics
0% accuracy
In the reaction 2^1H + 3^1H → 4^2He + 1^0n, if the binding energies of 2^1H, 3^1H and 4^2He are respectively a, b and c (in MeV), then the energy (in MeV) released in this reaction is :
Q29mediummcqPhysicsPhysics
0% accuracy
A radioactive nucleus of mass emits a photon of frequency and the nucleus recoils. The recoil energy will be:
Q30mediummcqPhysicsPhysics
If , and denote the masses of the nucleus, proton and neutron respectively and represents its binding energy in , then:
Q31easymcqPhysicsPhysics
Two nuclei have their mass numbers in the ratio of . The ratio of their nuclear densities would be:
Q32hardmcqPhysicsPhysics
Two radioactive materials and have decay constants and respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of to that of will be after a time:
Q33mediummcqPhysicsPhysics
Two radioactive substances and have decay constants and respectively. At they have the same number of nuclei. The ratio of the number of nuclei of to those of will be after a time interval:
Q34mediummcqPhysicsPhysics
If the nucleus has a nuclear radius of about , then would have its radius approximately as:
Q35mediummcqPhysicsPhysics
A nucleus has mass represented by . If and denote the mass of proton and neutron respectively and the binding energy, then:
Q36mediummcqPhysicsPhysics
In radioactive decay process, the negatively charged emitted -particles are:
Q37hardmcqPhysicsPhysics
Assertion: It is not possible to use as the fuel for fusion energy.Reason: The binding energy of is too small.
Q38mediummcqPhysicsPhysics
In the nuclear decay given below:

The particles emitted in the sequence are:
Q39easymcqPhysicsPhysics
The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:
Q40mediummcqPhysicsPhysics
In any fission process the ratio (mass of fission products/mass of parent nucleus) is :

Frequently Asked Questions

How many Nuclear Physics questions are on ExamTest.live?▼
We have 40 Nuclear Physics questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
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Which exams include Nuclear Physics questions?▼
Nuclear Physics questions are commonly asked in Physics, General Knowledge. You can filter by exam using the links above.
How do I practice Nuclear Physics questions effectively?▼
Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.