Modulation is the process of superposing

Options

A. low frequency audio signal on high frequency radio waves.
B. low frequency radio signals on low frequency audio wave.
C. high frequency radio signal on low frequency audo signal.
D. high frequency audio signal on low frequency radio waves.

Explanation

**Step-by-Step Solution:**

1. **Understanding Modulation**: Modulation is the process of modifying a signal to encode information. In communication systems, it involves combining a low-frequency signal with a high-frequency carrier wave.

2. **Identifying the Components**: The low-frequency signal typically represents the information we want to transmit, such as audio signals. The high-frequency carrier wave is used to carry this information over long distances.

3. **Purpose of Modulation**: The primary purpose of modulation is to enable the transmission of low-frequency signals over large distances. Low-frequency signals alone cannot travel far due to their properties, but when combined with a high-frequency carrier wave, they can be transmitted effectively.

4. **Carrier Wave**: In communication systems, the carrier wave is usually a radio wave, which has a high frequency. This high frequency allows it to propagate through the atmosphere and reach distant receivers.

5. **Conclusion**: Therefore, modulation is the process of superposing a low-frequency audio signal onto a high-frequency carrier wave (radio wave). This enables effective transmission of the audio signal over long distances.

**Final Answer**: Modulation is the process of superposing a low-frequency audio signal with a high-frequency carrier wave (radio wave).

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