Here is the CBSE Class 12 Physics Electromagnetic Waves Formulae for your studies. Use these Class 12 Physics revision notes, created by professional educators for the 2026-27 academic term. They make difficult ideas very easy to understand and focus on core definitions, helping Class 12 students prepare quickly before exams.
Download Class 12 Physics Chapter 8 Electromagnetic Waves Notes
Check out these Class 12 Physics Chapter 8 Electromagnetic Waves notes to study important concepts in very little time. These concise summaries target difficult questions and scoring chapters, helping you perform better in school exams and final tests.
Chapter 8 Electromagnetic Waves Revision Notes for Class 12 Physics
2. The charging current for capacitor is 0.5 A. What is the displacement current across its plate?
3. Write an expression for the speed of e.m. waves in free space.
4. For an electromagnetic wave, write the relationship between amplitude of electric and magnetic fields in free space.
5. What was the range of wavelength of em waves produced by Professor J.C.Bose?
TWO MARKS QUESTIONS
6. What is displacement current? Why was this concept introduced?
7. Give one uses of each of the following:
a. Microwave
b. Infra-red wave
c. Ultra violet radiation
d. Gamma rays
8. Identify the following electromagnetic radiation as per the wavelength given below. Write one application of each.
a. 1mm
b. 10-3nm
THREE MARKS QUESTIONS-
9. Identify the following electromagnetic radiation as per the wavelength given below. Write one application of each.
6. 10-12m
7. 10-4m
8. 106m
10. Name the electromagnetic radiation having the wavelength range from 1mm to 700nm. Give its two important applications.
11. What is meant by electromagnetic spectrum? Give its four uses.
6. The displacement current is that current which comes into existence, in addition in to the conduction current, whenever the electric field and hence the electric flux changes with time.
7. A. radar b. treatment of muscular complaints c. sterilizing surgical instruments d. radiation therapy.
8. A. microwave used in radar system b. infra red used in treatment of muscular complaints.
9. Identification:- a. gamma rays use- radiotherapy b. Infrared rays use – haze photography c. long radio wave use in radio communication.
10. X-rays used in a. medical diagnosis and b. in study of crystal structure.
11. All the known radiation from the big family of electromagnetic wave which stretch over a long range of wavelengths. The orderly distribution of the electromagnetic wave in accordance with their wavelengths or frequency in to distinct group having widely different properties is called electromagnetic spectrum. For example the X rays is one part of spectrum whose use are-
(i) used in detecting fractures in bones
(ii) used in detecting faults,cracks,haws & holes in metal sheets
(iii) used in studying crystal structure
(iv) used in radiotherapy
(v) used in detecting pearls, oysters etc.
12. An oscillating charge radiates electromagnetic waves and these waves carry energy.
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Chapter 8 Electromagnetic Waves Concepts & Summary for Class 12 Physics
Key Concepts & Summary for Class 12 Physics Chapter 8 Electromagnetic Waves
Utilize these Revision Notes for Chapter 8 Electromagnetic Waves to accelerate your exam readiness. Formatted under recent CBSE guidelines for Class 12, these summaries focus on critical curriculum components. Regular revision of these core points leads to superior performance in school tests.
NCERT-Aligned Revision Notes for Class 12 Physics
Compiled directly from the official NCERT book for Class 12 Physics, these notes offer reliable academic support. Following your chapter summary review, our educators recommend checking our detailed NCERT solutions for Class 12 to compare your understanding, helping build a strong foundation in Physics.
Chapter 8 Electromagnetic Waves Complete Revision and Practice
Maximize your exam preparation by solving the MCQ questions and printable worksheets hosted here. These extra problem sets test your true understanding of Chapter 8 Electromagnetic Waves. All online study materials remain completely free, updated for active Physics exam frameworks. Consistent daily use of these revision notes ensures high exam readiness.
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Yes, our CBSE Class 12 Physics Electromagnetic Waves Formulae include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Physics principles which is important for getting more marks in 2026 CBSE exams.
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