Physics Concept Notes for Class 12: Chapter 08 Electromagnetic Waves
Access comprehensive revision notes for Chapter 08 Electromagnetic Waves using the CBSE Class 12 Physics Electromagnetic Waves Formulae. Designed to align with the 2026-27 academic syllabus for Class 12 Physics, these concept summaries help students streamline their exam preparation and review complex topics efficiently.
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Access the complete concept summary PDF for Chapter 08 Electromagnetic Waves below. Regular review of these targeted notes builds familiarity with complex Class 12 Physics themes and helps secure higher marks in final school evaluations.
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 08 Electromagnetic Waves Concepts and Summary for Class 12 Physics
About Chapter 08 Electromagnetic Waves Revision Notes
Access structured revision notes for Chapter 08 Electromagnetic Waves designed in alignment with the latest CBSE curriculum for Class 12 Physics. These summaries help clarify core themes and support effective daily study.
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FAQs
You can download the teacher prepared revision notes for CBSE Class 12 Physics Electromagnetic Waves Formulae from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Class 12 students get the best study material for Physics.
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.
Yes, our CBSE Class 12 Physics Electromagnetic Waves Formulae provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of CBSE syllabus in Class 12 is covered.
These notes for Physics are organized into bullet points and easy-to-read charts. By using CBSE Class 12 Physics Electromagnetic Waves Formulae, Class 12 students fast revise formulas, key definitions before the exams.
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