Nuclei - ISC Class 12 Physics Questions with Answers
41 past-paper questions on Nuclei from ISC Class 12 Physics papers (2027-2018), newest first. Open one to see its answer.
- When can a gamma ray photon produce a proton and an antiproton pair? 2027 · 1 mark · Short answer
- Answer the following questions: Assuming that nuclei are spherical in shape, whose radius R is given by $R = R_0 A^{1/3}$ where… 2027 · 5 marks · Long answer
- Answer the following questions: Study the graph shown below and answer the questions that follow. (Recall) Indicate which region… 2026 · 5 marks · Short answer
- Answer the following questions: Calculate the minimum amount of energy which a gamma ray photon should possess in order to… 2026 · 5 marks · Long answer
- Answer either subparts (i) to (iii) or (iv) to (vii). Draw a labelled graph showing the variation of binding energy per nucleon… 2026 · 5 marks · Long answer
- What happens when an electron collides with a positron? (Recall) 2026 · 1 mark · Short answer
- In a panel discussion on Atomic and Nuclear Physics, one of the panelists explained the discovery of electrons by Sir J. J… 2026 · 5 marks · Case based
- Images produced by positron emitters have become important in recent years. When the emitted positron ($\beta^+$) encounters an… 2025 · 2 marks · Short answer
- Write a balanced equation of a nuclear fission reaction taking place in a nuclear reactor. By performing necessary calculations… 2025 · 5 marks · Short answer
- A group of students went on an educational tour of Bhabha Atomic Research Centre, Mumbai. They visited various nuclear reactors… 2025 · 5 marks · Short answer
- What happens when an electron collides with a positron? 2025 · 1 mark · Short answer
- What is the minimum energy a gamma ray ($\gamma$) photon should possess to produce an electron - positron pair? 2025 · 1 mark · Short answer
- The energy of the thermal neutrons required for the fission of $^{235}\text{U}$ nuclei is of the order of 0.025 eV. However, the… 2025 · 3 marks · Long answer
- In the first atomic bomb, the energy released was equivalent to about 30 kilotons of Trinitrotoluene (TNT), where a ton of TNT… 2025 · 2 marks · Numerical
- Find the binding energy per nucleon of $^{235}\text{U}$ based on the information given below. Mass (u) mass of neutral… 2025 · 5 marks · Numerical
- Given two nuclei $_{29}\text{Cu}^{64}$ and $_{13}\text{Al}^{27}$. Calculate the ratio of the radii. What will be the ratio of… 2025 · 3 marks · Long answer
- A graph showing the variation of binding energy per nucleon with mass number is given below. In the graph mark regions where… 2025 · 3 marks · Drawing
- Nuclear binding energy is the energy required to separate an atomic nucleus into its constituent protons and neutrons, or… 2025 · 3 marks · Long answer
- Calculate mass defect and binding energy of ${}^{20}_{10}\text{Ne}$ nucleus, given: Mass of… 2024 · 5 marks · Numerical
- In a nuclear reactor, state the use of the following: Graphite rods Cadmium rods 2024 · 2 marks · Short answer
- Name the type of nuclear reaction that takes place in the core of the Sun. 2023 · 1 mark · Short answer
- State the function of a moderator in a nuclear reactor. 2023 · 1 mark · Short answer
- Name any two essential parts of a nuclear reactor. State the function of any one of them. 2023 · 3 marks · Short answer
- State any two differences between Nuclear fusion and Nuclear fission. What is the essential difference between the working of a… 2023 · 3 marks · Short answer
- Mr. Ravi had been living in a small town with his family for many years. He decided to shift to a city when he learnt that a… 2022 · 3 marks · Case based
- Calculate the minimum amount of energy which a gamma ray photon should have for the production of an electron and a positron pair. 2022 · 2 marks · Numerical
- Calculate binding energy of oxygen nucleus ($^{16}_{8}\text{O}$) from the data given below: Mass of a proton =… 2020 · 2 marks · Numerical
- For a radioactive substance, write the relation between: Half life ($T$) and disintegration constant ($\lambda$). Mean life… 2020 · 2 marks · Short answer
- In a nuclear reactor, cadmium rods are used as: 2020 · 1 mark · MCQ
- What is meant by mass defect? What conclusion is drawn from Rutherford’s scattering experiment of $\alpha$-particles? 2019 · 2 marks · Short answer
- In a gamma ray emission from nucleus: 2019 · 1 mark · MCQ
- Copy and complete the following table for a radioactive element whose half-life is 10 minutes. Assume that you have 30g of this… 2019 · 2 marks · Short answer
- The half-life of radium is $1550$ years. Calculate its disintegration constant ($\lambda$). 2019 · 2 marks · Numerical
- Name a material which is used in making control rods in a nuclear reactor. 2018 · 1 mark · One word
- What is meant by ‘binding energy per nucleon’ of a nucleus? State its physical significance. 2018 · 2 marks · Short answer
- Half Life of a certain radioactive substance is $69\cdot3$ days. Its disintegration constant is: 2018 · 1 mark · MCQ
- Name any one material used as a moderator in a nuclear reactor. 2018 · 1 mark · One word
- What is meant by the terms half-life of a radioactive substance and binding energy of a nucleus? 2018 · 2 marks · Short answer
- For radioactive disintegration of a radioactive substance, show that $N = N_0 e^{-\lambda t}$\nwhere the terms have their usual… 2018 · 3 marks · Derivation
- What is meant by pair annihilation? Write a balanced equation for the same. 2018 · 2 marks · Short answer
- Write one balanced equation each to show: Nuclear fission Nuclear fusion Emission of $\beta^-$ (i.e. a negative beta particle) 2018 · 3 marks · Short answer
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