Download the latest CBSE Class 12 Physics Communication Systems Notes Set B in PDF format. These Class 12 Physics revision notes are carefully designed by expert teachers to align with the 2025-26 syllabus. These notes are great daily learning and last minute exam preparation and they simplify complex topics and highlight important definitions for Class 12 students.
Chapter-wise Revision Notes for Class 12 Physics Chapter 15 Communication Systems
To secure a higher rank, students should use these Class 12 Physics Chapter 15 Communication Systems notes for quick learning of important concepts. These exam-oriented summaries focus on difficult topics and high-weightage sections helpful in school tests and final examinations.
Chapter 15 Communication Systems Revision Notes for Class 12 Physics
Class_XII: Physics
Chapter: Communication Systems
1. Analog and Digital Mode of Transmission. An analog message is physical quantity that varies with time usually in a smooth and continuous fashion.
A digital message is an ordered sequence of symbols selected from a finite set of discrete elements
2. Operational advantages of digital communication system over analog communication systems are:
(i) An improved security message
(ii) Increased immunity to noise and external interference.
(iii) A common format for encoding different kinds of message signals for the purpose of transmission.
(iv) Flexibility in configuration digital communication system.
3. Attenuation, Distortion, Interference and Noise are the undesirable effects in the source of signal transmission.
4. Modulation. Process of changing some characteristic e.g. amplitude, frequency or phase of a carrier wave in accordance with the intensity of the signal is known as modulation.
5. Types of Modulation
(i) Amplitude modulation
(ii) Frequency modulation
(iii) Phase modulation.
6. Amplitude Modulation. The amplitude of the carrier wave changes according to the intensity of the signal. The amplitude variation of the carrier wave is at the signal frequency s.
7. Modulation Factor. The ratio of change of amplitude of carrier wave to the amplitude of normal carrier wave is called modulation factor (m).
8. Pulse modulation could be classified as: Pulse Amplitude Modulation (PAM), Pulse Duration Modulation (PDM) or Pulse Width Modulation (PWM) and Pulse Position Modulation (PPM).
9. Demodulation. Demodulation is the process of recovering the signal intelligence from a modulated carrier wave.
10. FAX. Facsimiles of FAX means exact reproduction of the documents, a picture, letter, map etc. at receiver end.
11. MODEM. The term modem means modulator and demodulator. It converts a series of binary pulses of digital information into an analog signal and transmits across the phone lines.
Please refer to the link below for CBSE Class 12 Physics Notes - Communication Systems
| CBSE Class 12 Physics Alternating Current Notes Set A |
| CBSE Class 12 Physics Alternating Current Notes Set B |
| CBSE Class 12 Physics Wave Optics Notes Set A |
| CBSE Class 12 Physics Wave Optics Notes Set B |
Important Practice Resources for Class 12 Physics
CBSE Class 12 Physics Chapter 15 Communication Systems Notes
Students can use these Revision Notes for Chapter 15 Communication Systems to quickly understand all the main concepts. This study material has been prepared as per the latest CBSE syllabus for Class 12. Our teachers always suggest that Class 12 students read these notes regularly as they are focused on the most important topics that usually appear in school tests and final exams.
NCERT Based Chapter 15 Communication Systems Summary
Our expert team has used the official NCERT book for Class 12 Physics to design these notes. These are the notes that definitely you for your current academic year. After reading the chapter summary, you should also refer to our NCERT solutions for Class 12. Always compare your understanding with our teacher prepared answers as they will help you build a very strong base in Physics.
Chapter 15 Communication Systems Complete Revision and Practice
To prepare very well for y our exams, students should also solve the MCQ questions and practice worksheets provided on this page. These extra solved questions will help you to check if you have understood all the concepts of Chapter 15 Communication Systems. All study material on studiestoday.com is free and updated according to the latest Physics exam patterns. Using these revision notes daily will help you feel more confident and get better marks in your exams.
You can download the teacher prepared revision notes for CBSE Class 12 Physics Communication Systems Notes Set B from StudiesToday.com. These notes are designed as per 2025-26 academic session to help Class 12 students get the best study material for Physics.
Yes, our CBSE Class 12 Physics Communication Systems Notes Set B 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 Communication Systems Notes Set B 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 Communication Systems Notes Set B, Class 12 students fast revise formulas, key definitions before the exams.
No, all study resources on StudiesToday, including CBSE Class 12 Physics Communication Systems Notes Set B, are available for immediate free download. Class 12 Physics study material is available in PDF and can be downloaded on mobile.