Frequency Modulation
In FM, which parameter of carrier varies with modulating signal?
Select the correct option:
Solution
Frequency
In Frequency Modulation (FM), the instantaneous frequency of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating (message) signal. While the frequency changes, the amplitude of the carrier remains constant. This constant amplitude property makes FM much more resistant to noise (which primarily affects amplitude) compared to AM.
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About This Question
- Subject
- physics
- Chapter
- communication systems
- Topic
- frequency modulation
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Frequency
In Frequency Modulation (FM), the instantaneous frequency of the carrier wave is varied in proportion to the instantaneous amplitude of the modulating (message) signal. While the frequency changes, the amplitude of the carrier remains constant. This constant amplitude property makes FM much more resistant to noise (which primarily affects amplitude) compared to AM.
This medium difficulty physics question is from the chapter communication systems, covering the topic of frequency modulation. It appeared in the 2025 exam.
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