Chapter 15: Communication Systems Class 12 Physics NCERT Solutions

Understand modulation, bandwidth, types of communication systems, and satellite communication through Chapter 15 NCERT Solutions. Clear all theoretical and numerical doubts easily. Download free PDFs to revise better. Scroll down for complete and well-explained solutions.

What You Will Learn in Chapter 15 – Communication Systems

Communication systems play a key role in everyday life, allowing us to send and receive information almost instantly. This chapter explains the essential components of a communication system, the types of signals used, and how modulation enables long-distance communication.

Topics covered in this chapter include:

• Elements of a communication system

• Bandwidth of signals and transmission medium

• Basic concepts of analog and digital signals

• Modulation and its types (AM, FM, PM)

• Need for modulation in communication

• Propagation of electromagnetic waves (ground wave, sky wave, space wave)

• Amplitude modulation: process and waveforms

• Basic block diagram of a transmitter and receiver

• Role of antennas and repeaters

These topics give students a real-world understanding of how wireless and wired communications work, along with an introduction to radio frequency transmission.

Why Use Our NCERT Solutions for Chapter 15?

This chapter has many theoretical concepts and technical terms, which can seem abstract without proper explanation. Our solutions aim to make the chapter engaging and easy to understand by providing:

• Clear, step-by-step answers to all NCERT textbook questions

• Concise summaries and explanations of key terms

• Illustrations and diagrams for communication models and waveforms

• Easy-to-follow logic for modulation techniques

• Answers written in accordance with CBSE exam marking scheme

• Based on the latest 2023–24 syllabus

Whether you are preparing for board exams or building foundational knowledge for competitive exams, these solutions will help you stay ahead.

Download Class 12 Physics Chapter 15 Solutions PDF

Prefer studying offline? Our downloadable PDF version of NCERT solutions for Chapter 15 allows you to revise anytime, anywhere. It’s especially useful for last-minute prep or when internet access is limited.

Benefits of downloading the PDF:

• All answers organized in one place

• Ready-to-print or annotate on your device

• Handy for group study or doubt-clearing sessions

• Free and accessible anytime

Download the complete set of solutions using the link on this page.

Key Concepts from Chapter 15

Some important takeaways from this chapter include:

• Communication system components: Transmitter, channel, and receiver

• Modulation: Changing a carrier wave to transmit information

• Types of propagation:

  • Ground wave: for low-frequency signals

  • Sky wave: reflects off the ionosphere

  • Space wave: line-of-sight signals (used in TV, microwave, etc.)

• Bandwidth requirements for audio, video, and data

• Advantages of digital communication over analog

• Amplitude Modulation (AM): process, wave shapes, and mathematical representation

Understanding these principles lays the groundwork for electronics, information technology, and modern communication networks.

Begin with NCERT Solutions for Class 12 Physics Chapter 15

Scroll down to start reviewing all NCERT textbook questions and detailed solutions for Chapter 15 – Communication Systems. Each answer has been written to simplify the subject while retaining scientific accuracy.

This final chapter ties together many concepts learned throughout the year and shows how physics shapes the digital world we live in. If you’re planning a career in science, technology, or engineering, this chapter offers insights into how information travels at the speed of light.

Explore the solutions below or download the PDF to get started.