Question

The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as:
(A) Transmission
(B) Reception
(C) Modulation
(D) Detection

Answer 1

Hint: To answer this question, we should be aware of the function of a carrier wave. Carrier wave is defined as the wave, which carries the information from the source to the receptor. In the field of communication, the process in which one or more properties of a periodic waveform is varied is the answer to this question.

Complete step by step answer:
The process of modulation is defined in the field of electronics and telecommunication as varying some one or more than one specific properties of a waveform that changes periodically. This waveform is known as the carrier signal. The carrier signal along with the modulating signal that contains the information is transmitted.

Therefore, we can say that in telecommunications, modulation is the process in which a message signal is conveyed. For instance, a digital bit stream or even an analog audio can be physically transmitted by placing them inside another signal.

Hence, we can say that the process of superimposing signal frequency (i.e audio wave) on the carrier wave is known as modulation.

So, option C is the correct answer.

Note: To avoid the confusion between the various options present, we should be knowing the meaning of each of them. By transmission, we mean the process which involves the sending of electrical signals to various devices like radio, television. For these devices the information spreads from one person to another.
Reception is defined as the process in which any message signal is received by the devices. And lastly, detection is defined as the process of identifying the signals which consists of noise embedded in them with the help of mathematical theory.