NCERT Solutions Class 12 Physics Chapter 13

NCERT Solutions Class 12 Physics Chapter 13- Nuclei

The NCERT Solutions Class 12 Physics Chapter 13 provide information about the nucleus and are available on the Extramarks platform. It is a vital study material to make students well equipped for the important CBSE Class 12 Board examinations. The answers given are in a detailed, stepwise, and lucid manner so that students can revise all concepts thoroughly. Every minute detail provided is based on the NCERT books and the latest guidelines issued by the Central Board of Secondary Education (CBSE). 

The NCERT Solutions Class 12 Physics Chapter 13 Nuclei is prepared by subject elites of Extramarks with an aim to get a firm grip on theoretical knowledge and develop problem-solving abilities. 

The Nuclei chapter is very important and carries high weightage. In the chapter, students will learn various properties and fundamentals related to nuclei. Topics like Atomic Masses, Composition Of Nucleus, Mass-energy, Nuclear Binding Energy, and Radioactivity are covered in the NCERT Solutions Class 12 Physics Chapter 13. Experiments based on the scattering of α-particles are also demonstrated using diagrams. Besides derivations and theory, the calculation of numerical problems from various topics is explained in a step-by-step format. 

Extramarks, an online learning platform, assists students in exam preparation by providing extremely reliable, accurate, and simplified notes. Students may refer to the NCERT Solutions Class 11 to brush up on their basic knowledge. In addition to class 11, Extramarks also offers NCERT Solutions for various other classes, from Class 1 to Class 12.

Key Topics Covered In NCERT Solutions Class 12 Physics Chapter 13

The NCERT Solutions Class 12 Physics Chapter 13 helps students in quick revision. It provides many objective and subjective questions from the chapter. The notes contain not only a list of questions that are most likely to be asked in the exam but also previous year-solved questions. These Solutions are prepared by the experienced and expert faculty of Extramarks. 

The NCERT Solutions Class 12 Physics Chapter 13 aims to provide perfect knowledge of all complex topics and an in-depth understanding of all minute details of the chapter. The notes cover the following key topics: 

13.1 Introduction

Ch 13 physics class 12 is based on the constituents of the nucleus, such as size, mass, density, and stability. Associative nuclear phenomena such as radioactivity, nuclear fission, and nuclear binding energy are also well explained. Many numerical questions are asked from all concepts included in this chapter. 

Students will learn the following topics in the NCERT Solutions Class 12 Physics Chapter 13 Exercise 13.1: 

• Nuclear binding energy
• Nuclear fusion
• Nuclear fission
• Half-life and Mean life
• Radioactive decay
• Soddy and Fajan’s displacement law

13.2 Atomic Masses And Composition Of Nucleus

This section in the NCERT solutions class 12 physics chapter 13 nuclei gives brief information about the atomic mass unit given as 1amu = 931 MeV. Under the composition of the nucleus topic, students learn about the basic fundamentals of the atom. It includes atomic number, atomic mass number, representation of nuclear species, isotopes, isobars, and isotones. A small introduction about the discovery of an atom is also mentioned in this section. 

A firm grip on these concepts is very important to understand complex topics included in the NCERT Solutions Class 12 Physics Chapter 13.

13.3 Size Of The Nucleus

Under this section in the Class 12 physics chapter 13 NCERT solutions, students will learn about the size of the nucleus. These derivations are often asked in exams. This topic is explained in detail in the NCERT Solutions Class 12 Physics Chapter 13. 

The formula to find the size of the nucleus is given as R = RoA1/3, where Ro= 1.2 X 10-15m and A is the atomic mass number. 

13.4 Mass-energy And Nuclear Binding Energy

This section of NCERT solutions class 12 Physics Chapter 13 includes information on Mass-energy given by scientist Einstein. It is based on the study of many discovered particles such as nucleons, nuclei, etc. The nuclear binding energy gives the relation between the mass of the nucleus and the number of protons and neutrons. 

The Mass energy formula is E = mc2. 

Mass defect= M = {Zmp+ (A-Z) mn]-M

The step-by-step and detailed explanations of the formula in the NCERT solutions class 12 Physics Chapter 13 will help students to perceive the concept better and enhance their learning process significantly.

13.5 Nuclear Force

Students will learn about the forces acting inside the nucleus. Also, some properties by Yukawa are mentioned in this section of NCERT Solutions Class 12 Physics Chapter 13. 

13.6 Radioactivity

The concept of radioactivity and some properties associated with it is explained in detail using the diagram. This section is further divided into four parts in the NCERT Solutions Class 12 Physics Chapter 13. It gives information about the Law of radioactive decay and its types, such as Alpha decay, Beta-decay, and Gamma decay. Students can easily understand these topics with the help of examples. 

Some features of these Becquerel rays are also mentioned in this section. Students are advised to be well-versed with terms like neutrino, antineutrino, and electron capture. The Law of radioactive decay gives the direct relation between radioactive elements and the number of nuclei. The graphical explanation is also given for better understanding. 

Mathematically, it is given as dNdtN. This section includes the SI unit of the radioactive sample, which is given as becquerel. Students also learn about Soddy and Fajan’s displacement law for , , – rays. 

13.7 Nuclear Energy

With the help of this section, students will know what nuclear fission, nuclear fusion and the difference between the two are. The examples for the same are given. Students will be asked to calculate the half-life and mean life of a  radionuclide. Many numerical questions based on these are asked in the exam. 

Students may refer to the NCERT solutions class 12 physics chapter 13 by clicking on the respective chapter.

List of NCERT Solutions Class 12 Physics Chapter 13 Exercise & Answer Solutions

‘Nuclei’ is a crucial chapter. It is important for students to study the entire chapter thoroughly to attain high scores. Students can use the NCERT Solutions Class 10, Class 9, and Class 8 to recall the basic topics studied in previous classes. The study materials are available on the online learning platform Extramarks for free. Using these NCERT Solutions Class 12 Physics Chapter 13, students can solve innumerable questions based on the latest guidelines issued by CBSE (Central board of education). The solution to all questions, based on the following topic, is explained in detail. Students may click on the link below to get access to the NCERT Solutions Class 12 Physics Chapter 13.

Students can also practise Extramarks sample papers to witness notable improvement in their scores. In addition, they may access the NCERT Solutions for other classes by clicking on the respective link below.

• NCERT Solutions Class 1
• NCERT Solutions Class 2
• NCERT Solutions Class 3
• NCERT Solutions Class 4
• NCERT Solutions Class 5
• NCERT Solutions Class 6
• NCERT Solutions Class 7
• NCERT Solutions Class 8
• NCERT Solutions Class 9
• NCERT Solutions Class 10
• NCERT Solutions Class 11
• NCERT Solutions Class 12

NCERT Exemplar Class 12 Physics

Physics is not an easy subject. It requires practice, consistency, and in-depth knowledge of all concepts. The solutions provided to the NCERT questions help students solve the (HOTS) questions and develop their problem-solving abilities. Apt and minute details of every chapter are available in the Extramarks NCERT Solutions Class 12 Physics Chapter 13. MCQs, Numerical Problems, and CBSE extra questions based on all important concepts are included in these notes. Students can learn various tips and tricks to tackle complex questions in an easier way. 

Key Features of NCERT Solutions Class 12 Physics Chapter 13

The key features of NCERT Solutions Class 12 Physics Chapter 13 provided by Extramarks include

• The NCERT Solutions can be used for quick revision as it includes all important formulas, equations, and detailed answers to all questions. 
• The solutions are compiled by some of the best subject matter experts at Extramarks.
• These notes can be accessed from anywhere on any device, namely, mobile, laptop, tablet, or PC.
• With the help of detailed solutions, students can clarify their doubts and attain an in-depth understanding of every concept.
• The class 12 physics chapter 13 NCERT solutions help to improve their problem-solving capabilities, logic, and analytical skills.