NCERT Solutions for Class 12 Physics Chapter 15 Communication Systems
Firstly, it’s a tough job to score decent marks in Physics. In addition, its formulas are harder than the theory because students do not know the way of putting value clearly. For this reason, we have prepared these NCERT Solutions for Class 12 Physics Chapter 15 that will direct student attention to a simplified and easy explanation. Also, our proficient teacher is always available to resolve any issue that the students face.
Besides, the solutions are in the student’s understandable language. Moreover, our skilled teacher has designed them to express a proper and complete sense and explanation of each topic and formulas of the chapter.
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CBSE Class 12 Physics Chapter 15 Communication Systems NCERT Solutions
For Introduction, communication system refers to the sending and receiving of the data and information from one place to another. Moreover, these NCERT Solutions for Class 12 Physics Chapter 15 aims to introduce the students to the concept of communication. Besides, the solution uses charts, diagram, examples, and illustrations to explain each topic in interesting and easy to learn a language.
Subtopics covered under NCERT Solutions for Class 12 Physics Chapter 15
15.1 Introduction
This topic defines what is communication how it happens and what is its barrier. Besides, this topic also defines the modern concept of communication.
15.2 Elements of a Communication System
This topic describes the various elements of communication. Moreover, the topic describes a major milestone in the history of communication in the form of a chart.
15.3 Basic Terminology Used in Electronic Communication Systems
This topic defines the various language that is used in the communication process. This terminology includes
- Transducer
- Signal
- Noise
- Transmitter
- Receiver
- Attenuation
- Amplification
- Range
- Bandwidth
- Modulation
- Demodulation
- Repeater
15.4 Bandwidth of Signals
This topic defines that every message is sent in the form of a signal and each machine uses different frequency known as bandwidth. Also, the bandwidth of different devices is different and it ranges from 300 Hz to 3100 Hz.
15.5 Bandwidth of Transmission Medium
This topic outlines the various mediums used by different media for the transmission of their message. Moreover, these include fiber optics cable, coaxial cable, wire, and free space. Also, their bandwidth range is approximately 750 MHz. Besides, there is a chart on the topic that describes the important wireless communication frequency bands.
15.6 Propagation of Electromagnetic Waves
This topic discusses the spread of electromagnetic waves that are transmitted and received using a radio or any other equipment.
15.6.1 Ground wave- This refers to that radio waves that get to the receiver directly.
15.6.2 Sky wave- These are those waves which get to receiver after reflection from the ionosphere.
15.6.3 Space Wave- This refers to the high-frequency waves that are transmitted from high antenna to a high receiver from space.
15.7 Modulation and its Necessity
This Topic explains how carrier signal changes form according to the message signal.
15.7.1 Size of the antenna or aerial- This defines that the size of the antenna should be compatible with the wavelength of the signal.
15.7.2 Effective power radiated by an antenna- This topic overviews the radiation emission of a linear antenna.
15.7.3 Mixing up of Signals from different transmitters- This topic argues about the mixing up of signals when the number of user increases.
15.8 Amplitude Modulation
This topic defines the use of radio carrier waves for transmitting information.
15.9 Production of Amplitude Modulated Wave
This topic describes how amplitude modulation waves are produced by various steps.
15.10 Detection of Amplitude Modulated Wave
This topic talks about the process of recovering an amplitude modulated wave.
Summary- This topic sums up all the topic and important details in pointer form.
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