CBSE Class 12 Physics Revision Notes

Introduction to CBSE Exam

Central Board of Secondary Education (CBSE) is India’s top national level board of education for private and public schools. CBSE defines appropriate approaches to academic activities to provide child-centred and holistic education to all students with good quality. Approximately 20,299 schools are affiliated with CBSE in India, apart from 220 schools abroad in 28 countries. The Union Government of India manages the CBSE Board. 

CBSE Class 12 Physics Notes

The CBSE Class 12 Physics Notes cover the latest revised chapters and topics as per the recent CBSE Syllabus to prepare the Physics Class 12 Notes in a much-organised and detailed manner. These Notes have been prepared by subject experts and cover each chapter in detail. This involves the questions and answers that are most expected to appear in the Class 12 board examination. The revision Notes are prepared by keeping the last few years’ question papers checked and updated according to the latest syllabus. Students will also find neat and labelled diagrams to the questions in Physics Class 12 NCERT Notes. It’s crucial to know all the essential 13 topics of Class 12 Physics thoroughly to perform well in exams. CBSE students can find a complete overview of all the chapters with relevant examples on these comprehensive Notes created by Extramarks.

Chapter Wise Notes for Class 12 Physics

Class 12 Physics contains a total of 15 significant chapters. These Notes offer students a chapter-wise summary of the topics, essential points to remember, elaborate explanations of the critical issues, and illustrations for better clarity of the chapter content. A panel of experienced teachers at Extramarks have diligently prepared the chapter-wise Notes according to the NCERT syllabus to ensure a clear and smooth understanding of the concepts for students to score well on Board and competitive exams.

Exercise Topic
Chapter 1 Electric Charges and Fields
Chapter 2 Electrostatic Potential and Capacitance
Chapter 3 Current Electricity
Chapter 4 Moving Charges and Magnetism
Chapter 5 Magnetism and Matter
Chapter 6 Electromagnetic Induction
Chapter 7 Alternating Current
Chapter 8 Electromagnetic Waves
Chapter 9 Ray Optics and Optical Instruments
Chapter 10 Wave Optics
Chapter 11 Dual Nature of Radiation and Matter
Chapter 12 Atoms
Chapter 13 Nuclei
Chapter 14 Semiconductor Electronics
Chapter 15 Communication Systems

Chapter 1 . Electric Charges and Fields

Electric charge is the property associated with different forms of matter because of which it produces electric and magnetic effects. It is also caused due to the generation of static electricity. The two types of charge in nature are positive and negative charges. CBSE Class 12 Physics Notes, ‘Electric Charges and Fields’, is an important chapter, which acts as a foundation for the following chapters. To prepare well for the subject, you need to have all the ‘Electric charges and field’ concepts cleared, and Extramarks Notes for this chapter discusses all the facts in detail. Electrostatics involves the study of forces, fields, and potentials arising from static charges.

Chapter 2. Electrostatic Potential and Capacitance

At any point in an electric field, the electrostatic potential is equal to the amount of work done per unit positive test charge or bringing the unit positive test charge from infinity to that point against the electrostatic force without acceleration. This chapter includes the usage of many complicated equations and formulas. A link to the CBSE Class 12 Physics Notes is available here. The link consists of essential questions, answers to questions from the textbook, worksheets, and other assignments, which students can use to understand the concepts discussed in the chapter. 

Chapter 3. Current Electricity

The rate of flow of electric charge through any cross-section of a conductor is known as electric current. This chapter will teach students some of the fundamental laws concerning steady electric currents. They will also be introduced to essential topics like Ohm’s law, Kirchoff’s law, EMF, etc. Lots of calculations to be done in this unit. The chapter is vast, and students have to understand and remember a lot of topics. Extramarks provides detailed ‘Current Electricity’ CBSE Class 12 Physics Notes, which will help students gain a comprehensive understanding of the topics and a clear idea of the chapter.

Chapter 4. Moving Charges and Magnetism

The source of the magnetic field is a moving charge. Students are given detailed information on the concepts of moving charges and magnetism. This chapter also includes several topics with significant marks allotment, like magnetic field and direction of a circular coil,  magnetic force. Students can click on the links on the CBSE Class 12 Physics Notes article from the Extramarks website. These Notes will assist you in understanding the vital topics and remembering the key points from the exam point of view. 

Chapter 5. Magnetism and Matter

When exposed to magnetism, matter reacts in a certain specific way. The presence of a magnetic field itself leads to the formation of various magnetic materials. Magnetism and matter make for a significant chapter in Physics. More on this chapter has been elaborated on CBSE Class 12 Physics Notes. The chapter on magnetism and matter is vital for the examination of CBSE students. One of the most important concepts included in NCERT Solutions for Class 12 Physics is ‘Magnetism and Matter’, and it requires a lot of imagination.

Chapter 6. Electromagnetic Induction

The generation of current by changing the magnetic flux is known as Electromagnetic Induction. This either happens when a conductor is constantly moving in a stationary magnetic field or when a conductor is placed in a moving magnetic field. Air conditioners, generators, and electric transformers work on this principle. The Extramarks CBSE Class 12 Physics Notes provide reliable and simplified content at par with the latest CBSE Syllabus. 

Chapter 7. Alternating Current 

Alternating current is defined as the current that varies like a sine function with time. The current value will oscillate between a maximum value and a minimum value. Alternating current has been applied in the audio signals, radio signals, etc. This can also power electric motors and finds its use in many large appliances like dishwashers, refrigerators, and many other machines. The chapter on the alternating current will help students have a deeper understanding of electricity concepts. CBSE Class 12 Physics Notes will allow students to clarify their doubts more effectively during self-study hours.

Chapter 8. Electromagnetic Waves

Electromagnetic waves are produced by an electric charge where a magnetic field occurs due to an electric field and vice versa. Electromagnetic waves are used in radar and communication technology to detect forged bank Notes and security cameras. The properties of different electromagnetic waves are described and discussed in CBSE Class 12 Physics Notes with a proper explanation. The students will learn how these waves behave in other conditions and how different laws and equations follow every type of electromagnetic wave.

Chapter 9. Ray Optics and Optical Instruments

Ray optics and optical instruments are also regarded as geometrical optics, as per which the light travels in a straight line and states that every object has an image. The optical devices out there which have been made utilising reflecting and refracting properties of lenses, prisms, and mirrors are the optical instruments. CBSE Class 12 Physics Notes include worksheets, Important Questions, and exercises that will aid students in understanding the topic thoroughly.

Chapter 10. Wave Optics

Wave optics, also called physical optics, deals with the study of various phenomena such as diffraction, interference, polarisation, and other occurrences where ray approximation of geometric optics cannot be made. Wave optics are the section of optics that deals with the behaviour of light and its wave characteristics. Students going through CBSE Class 12 Physics Notes will learn about certain principles and concepts of light and its wave optics. Students can also choose to click on the links provided on the website by Extramarks.

Chapter 11. Dual Nature of Radiation and Matter

The dual nature of matter and radiation deals with the duality like matter, namely particle nature and wave nature. Various scientists have done multiple experiments to prove it. For example, light behaves both as a wave and as a particle. CBSE Class 12 Physics Notes ease your work of preparing Notes and revisions. The chapter contains Important Questions with answers, important tables, and worksheets. These chapter notes can be accessed by all students, at any time, on their tablets, laptops, desktops, or smartphones. 

Chapter 12. Atoms

Atoms are made up of subatomic particles including protons, neutrons, and electrons. Atoms are defined as “the basic building blocks of matter”. In CBSE Class 12 Physics Notes, explanations of atoms are provided comprehensively according to the latest CBSE Syllabus. Preparing with these Notes helps students learn about advanced concepts of atoms such as Rutherford’s model, Paschen series of spectral lines, etc. Studying these NCERT Books will make you confident in answering textbook questions, numerical problems, MCQs, worksheets, and Important Questions from Chapter 12 atoms. 

Chapter 13. Nuclei

The nucleus is a collection of individual particles called protons, which are positively charged, and electrically neutral neutrons. Quarks are protons and neutrons that are made of particles. The Extramarks CBSE Class 12 Physics Notes are prepared by our subject experts as per the latest term. By referring to these solutions, students get a complete insight into the topic of nuclei.

Chapter 14. Semiconductor Electronics

Semiconductor electronics are made of material, devices,  and simple circuits. They have multiple uses across different areas and are essential in the electrical and electronics industry. To know more about semiconductors, refer to the Notes by visiting the link on the Extramarks website. The CBSE Revision Notes have answers to the textbook questions, CBSE Extra Questions, questions from previous year question papers, sample papers, exercises, and worksheets.

Chapter 15. Communication Systems

Every living being in the world experiences the need to send or receive information. Communication is the act of transmission and reception of data. A communication system consists of a transmitter, communication channel, and receiver. The CBSE Class 12 Physics Notes for chapter ‘Communication Systems’ are written by subject experts after extensive research on every topic to produce authentic information. The CBSE Syllabus presents questions like filling in the blanks, true or false, matching the following, essential formulas, exercises, and assignments, all covered in Extramarks Notes.

Extramarks experts specially design the Class 12 Physics Notes with an in-depth understanding of the subject to help students complete their studies with the highest score desired, thus clearing all the doubts that may arise while studying.

For more CBSE Class 12 Physics Notes, check the links given below:

CBSE Class 12 Physics Revision Notes Important Questions for Class 12 Physics

The CBSE Class 12 Physics Notes are designed to make concepts clear to the students with practical solutions, real-life examples and detailed chapters. 

CBSE Class 12 Physics  –  Distribution of Marks 

  1. The theory paper constitutes total – 70 marks
  2. Practicals constitute total – 30 marks

How Extramarks Can Help Students with Class 12 Physics?

Extramarks helps students improve their grades and get a sound understanding of concepts. The learning of the 12th Physics Notes has been made effective and accessible with engaging and highly adaptive programs. The different study modules offered by Extramarks for CBSE Revision Notes will make your learning process simple and efficient. 

FAQs (Frequently Asked Questions)

1. Is Class 12 Physics tough?

As per the experts, CBSE Class 12 Physics paper is of moderate difficulty level but it is a little lengthy. The questions are primarily conceptual. Students often find the paper long and tricky as per the feedback received. The CBSE Sample Papers on the Extramarks website will give you a better idea and the essential resource material necessary for exam preparation.

2. Which is the most critical chapter in Physics Class 12?

Dual Nature of Matter, Magnetism, Electrostatics and Atoms and Nuclei. These chapters carry an excellent weightage of marks. You will find some prior year question papers for revision on our website.

3. Which is the most straightforward chapter in Physics Class 12?

Current Electricity, Electronic Devices, and Electromagnetic Induction and Alternating Currents. Referring to the CBSE Class 12 Physics Notes from the Extramarks website makes learning all 15 Physics chapters smooth and straightforward for every student.