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NDA Nuclear and Modern Physics questions with solutions

Radioactivity, nuclear energy and modern physics. 9 questions from our 2019–2025 NDA pattern papers, from the Class 12 Physics syllabus. Each has the answer and a full solution.

NDA 2025

Radiations is NOT deflected by an electric field or a magnetic field?NDA 2025 GAT · hard
A radioactive sample has a half-life of 10 days. If the sample initially has 80 g of the radioactive substance, the amount left after 30 days will beNDA 2025 GAT · medium

NDA 2024

In a nuclear reactor, the control rods used to absorb the excess neutrons are made ofNDA 2024 GAT · hard

NDA 2023

The surgical and imaging use of high-energy radiation is possible because gamma rays, among alpha, beta and gamma radiations, have theNDA 2023 GAT · easy
The binding energy per nucleon is maximum for nuclei of mass number nearNDA 2023 GAT · hard

NDA 2022

An atom of uranium-238 (atomic number 92) emits one alpha particle. The resulting nucleus hasNDA 2022 GAT · hard

NDA 2021

The energy of the Sun is produced mainly by the nuclear process in whichNDA 2021 GAT · easy
The half-life of a radioactive substance is 10 days. The fraction of the original amount remaining after 30 days isNDA 2021 GAT · medium

NDA 2019

When a nucleus emits a beta particle, itsNDA 2019 GAT · hard

Other General Knowledge topics

Current Affairs 37 Indian Economy 36 Constitution and Fundamental Rights 46 Parliament, Executive and Judiciary 23 Ancient India 36 Medieval India 28 Freedom Struggle 50 Modern India and British Rule 41 World Geography 29 Indian Geography 81 Physical Geography 31 Units and Measurements 11 Motion, Forces and Gravitation 40 Work, Energy and Power 7 Fluids and Pressure 10 Heat and Thermal Physics 8 Sound and Waves 16 Light and Optics 37 Current Electricity 20 Magnetism and Electromagnetic Induction 17 Atomic Structure, Periodic Table and Bonding 31 Acids, Bases and Salts 13 Metals, Alloys and Corrosion 20 Carbon and Organic Chemistry 22 Chemical Reactions 12 Mole Concept and States of Matter 13 Chemistry in Everyday Life 16 Cell Biology and Classification 18 Genetics and Heredity 13 Plant Physiology 21 Nutrition, Diseases and Health 28 Human Physiology 62 Ecology and Environment 24