Amplitude modulation is the process of

Options

A. superimposing a high frequency signal on a high frequency carrier signal
B. superimposing a low frequency signal on a high frequency carrier signal
C. single sideband communication
D. amplitude shift and phase shift

Answer

**Step-by-Step Solution:**

1. **Understanding Amplitude Modulation (AM):**
Amplitude modulation is a technique used in electronic communication to transmit information. It involves varying the amplitude of a carrier wave in accordance with the information signal.

2. **Application of AM:**
This technique is primarily used for transmitting messages over long distances, especially through radio waves. It allows the transmission of audio signals, such as music or voice, over radio frequencies.

3. **Mechanism of AM:**
In amplitude modulation, a low-frequency signal (the message) is superimposed onto a high-frequency carrier wave. The carrier wave is a sine wave that has a constant amplitude and frequency, while the low-frequency signal carries the actual information.

4. **Superimposing Signals:**
The process of superimposing involves altering the amplitude of the carrier wave based on the instantaneous amplitude of the low-frequency signal. This results in a modulated wave that varies in amplitude but retains the frequency of the carrier wave.

5. **Conclusion:**
Therefore, amplitude modulation is the process of transmitting messages by superimposing a low-frequency signal onto a high-frequency carrier wave.

**Final Answer:** Amplitude modulation is the process of transmitting messages by superimposing a low-frequency signal onto a high-frequency carrier wave.

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