In frequency modulation, the amount of frequency deviation depends on the

Options

A. Frequency of audio signal
B. Amplitude of audio signal
C. Both the frequency and amplitude of audio signal
D. None of these

Answer

To solve the question regarding the factors that affect frequency deviation in frequency modulation (FM), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Frequency Modulation (FM)**:
- Frequency Modulation is a technique used in electronic communication, most commonly for transmitting information over a radio carrier wave by varying its frequency.

2. **Identifying the Factors**:
- The question asks about the factors that influence the amount of frequency deviation in FM. The options provided are:
- Option 1: Frequency of audio signal
- Option 2: Amplitude of audio signal
- Option 3: Both frequency and amplitude of audio signal
- Option 4: None of these

3. **Analyzing the Role of Amplitude**:
- In FM, the frequency deviation is primarily affected by the amplitude of the modulating signal (the audio signal). A higher amplitude of the audio signal results in a greater frequency deviation.

4. **Analyzing the Role of Frequency**:
- While the frequency of the audio signal can affect the modulation process, it does not directly determine the amount of frequency deviation in the same way that amplitude does.

5. **Conclusion**:
- Based on the analysis, we conclude that the amount of frequency deviation in frequency modulation depends on the amplitude of the audio signal. Therefore, the correct answer is:
- **Option 2: Amplitude of audio signal**.

### Final Answer:
The amount of frequency deviation in frequency modulation depends on the amplitude of the audio signal. Thus, the correct option is **Option 2**.

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