+91-8076753736 support@wiredfaculty.com

Sponsor Area

Wave Optics

Question

Wired Faculty App

Write briefly any two factors which demonstrate the need for modulating a signal.

Draw a suitable diagram to show amplitude modulation using a sinusoidal signal as the modulating signal.

Solution

Two factors justifying the need for modulation are:

(i) Practical size of antenna.
(ii) To avoid mixing up of signals from different transmitters i.e., avoid fluctuation and reduce the noise of signal.

Some More Questions From Wave Optics Chapter

What is space wave propagation?

What is sky wave propagation?

What is the meaning of the term 'attenuation' in communication system?

What are the three basic units of a communication system?

Why are short waves used in long distance broadcasts?

What is the purpose of modulating a signal in transmission?

State two factors by which the range of transmission of signals by a TV tower can be increased?

Name the type of communication system according to the mode of communication.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation