Home
Class 12
PHYSICS
The process of superimposing signal freq...

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

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the process of superimposing signal frequency (audio wave) on a carrier wave, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Terms**: - A **carrier wave** is a high-frequency electromagnetic wave that can carry information. - A **modulating signal** (in this case, an audio wave) is the signal that contains the information to be transmitted. 2. **Definition of the Process**: - The process of superimposing the modulating signal onto the carrier wave is what we need to identify. 3. **Identifying the Process**: - When the audio wave (modulating signal) is combined with the carrier wave, it alters the amplitude, frequency, or phase of the carrier wave. This process is essential for transmitting information over long distances. 4. **Conclusion**: - The specific term for the process of superimposing the modulating signal onto the carrier wave is called **modulation**. 5. **Final Answer**: - Therefore, the answer to the question is **modulation**.
Promotional Banner

Similar Questions

Explore conceptually related problems

Both amplitude modulation (AM) and frequency modulation (FM) are used for radio broadcasting. The amplitude of the high frequency carrier wave is varied or modulated in accordance with the variations in the amplitude of the audio signals that are to be transmitted, in te process of amplitude modulation in frequency modulation te amplitude of the carrier remains constant but its frequency is varied inn accordance withh the audio signal. Reception with AM signals is in general is affected by interference of various kinds ad elaborated equipment is required for FM broadcast. In india the radio signals are boarcast using-

Both amplitude modulation (AM) and frequency modulation (FM) are used for radio broadcasting. The amplitude of the high frequency carrier wave is varied or modulated in accordance with the variations in the amplitude of the audio signals that are to be transmitted, in te process of amplitude modulation in frequency modulation te amplitude of the carrier remains constant but its frequency is varied inn accordance withh the audio signal. Reception with AM signals is in general is affected by interference of various kinds ad elaborated equipment is required for FM broadcast. The rangeof a transmitter is

The process of separating radio signal from the modulated wave is known as

The process of recovering the audio signal from the modulated wave is known as

One of the components of frequency of amplitude modulated wave (AM) formed by the superposition of message signal of frequency omega_1 on a carrier wave of frequency omega_2 is

The efficient transmission of signals is achieved by superimposing electrical audio signals on a high frequency carrier wave (the process is known as modulation). When the amplitude of high frequency carrier wave is changed in accordance with the intensity of modulating signal, it is called amplitude modulation. The extent to which the amplitude of carrier wave is changed by the signal is described by modulation factor. It is given as m="Amplitude change of carrier wave"/"Amplitude of unmodulated carrier wave" Let a carrier wave is represented by V_c=V_c cos omega_ct Let the modulation factor be m, the maximum change in amplitude of carrier wave is mV_c So, modulating signal can be represented as v_m=mV_c cosomega_mt So, the amplitude of modulated wave is =V_c+mV_c cosomega_m t Using this value, the instantaneous voltage of modulated wave is E=V_c cos omega_c t+ (mV_c)/2 cos (omega_c+omega_m)t + (mV_c)/2 cos (omega_c-omega_m ) t The above wave contains three frequencies namely, f_c, f_c+f_m and f_c-f_m . The frequencies f_c+f_m and f_c-f_m are called side band frequencies , USB and LSB respectively. The fraction of total power carried by side band frequencies is

The efficient transmission of signals is achieved by superimposing electrical audio signals on a high frequency carrier wave (the process is known as modulation). When the amplitude of high frequency carrier wave is changed in accordance with the intensity of modulating signal, it is called amplitude modulation. The extent to which the amplitude of carrier wave is changed by the signal is described by modulation factor. It is given as m="Amplitude change of carrier wave"/"Amplitude of unmodulated carrier wave" Let a carrier wave is represented by V_c=V_c cos omega_ct Let the modulation factor be m, the maximum change in amplitude of carrier wave is mV_c So, modulating signal can be represented as v_m=mV_c cosomega_mt So, the amplitude of modulated wave is =V_c+mV_c cosomega_m t Using this value, the instantaneous voltage of modulated wave is E=V_c cos omega_c t+ (mV_c)/2 cos (omega_c+omega_m)t + (mV_c)/2 cos (omega_c-omega_m ) t The above wave contains three frequencies namely, f_c, f_c+f_m and f_c-f_m . The frequencies f_c+f_m and f_c-f_m are called side band frequencies , USB and LSB respectively. If modulation factor is 100% , the amplitude change of carrier wave is

In AM wave, carrier power is given by-

Assertion: The process of retrieval of information from the carrier wave at the reciever is termed as modulation. Reason: Repeater helps to modulate the signals.

A: Modulator is an essential component of a transmitter. R: Modulator superimposes a low frequency message signal on a high frequency carrier wave.