Question

In the communication system the modulation process is performed in ___________ section demodulation process is performed in __________ section.
 A) transmitter, receiver
 B) receiver, transmitter
 C) transmission channel, receiver
 D) transmitter, transmission channel

Answer 1

Hint: It is a process in which message signal and carrier signal, both are combined together to form a modulated signal. This total process is called modulation.
Some of the devices in which this process is used are mobile phones, radio, television etc.

Complete step by step solution

The process takes signal from slow frequencies (called as message) and pulls it up to a higher frequency (called as the carrier).
In communication system the original low frequency information signal cannot be transmitted to long distances so information contained in the low frequency message signal is superimposed on a high frequency wave, which acts as a carrier of the information known as the modulation process is performed in Transmitter section and getting back the information from the carrier wave is called as demodulation process, which is performed in Receiver section.
Thus, in the communication system the modulation process is performed in the Transmitter section and demodulation process is performed in the receiver section.

Therefore, A is the correct option.

Additional information:
There are 3 basic types of modulation: Amplitude modulation, Frequency modulation, and Phase modulation.

Notes: In radio communications, modulation is needed in the transmission systems to transfer the message into the available high frequency radio channel.
The process of modulation plays a major role in the fast transmission of signals.It has also eliminated the use of antennas.