Choose the correct statement :a)In frequency modulation the amplitude ...
In amplitude modulation, the amplitude of the high frequency carrier wave made to vary in proportional to the amplitude of audio signal.
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Choose the correct statement :a)In frequency modulation the amplitude ...
Explanation:
Frequency modulation (FM) and amplitude modulation (AM) are two common techniques used in radio communication to transmit audio signals over long distances. The main difference between FM and AM lies in how they modulate the carrier wave.
Frequency Modulation:
In frequency modulation, the frequency of the high frequency carrier wave is varied in proportion to the amplitude of the audio signal. This means that as the amplitude of the audio signal increases, the frequency of the carrier wave also increases, and vice versa.
Amplitude Modulation:
In amplitude modulation, the amplitude of the high frequency carrier wave is varied in proportion to the amplitude of the audio signal. This means that as the amplitude of the audio signal increases, the amplitude of the carrier wave also increases, and vice versa.
Correct Statement:
The correct statement is option C: "In amplitude modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal." This statement accurately describes the process of amplitude modulation, where the amplitude of the carrier wave is modulated based on the amplitude of the audio signal.
Key Points:
- Frequency modulation (FM) varies the frequency of the carrier wave in proportion to the audio signal.
- Amplitude modulation (AM) varies the amplitude of the carrier wave in proportion to the audio signal.
- Option C correctly describes amplitude modulation by mentioning the variation of carrier wave amplitude with the audio signal amplitude.
- The other options, A and B, incorrectly describe frequency modulation by mentioning amplitude variations instead of frequency variations.
- Option D incorrectly describes amplitude modulation by mentioning frequency variations instead of amplitude variations.
Conclusion:
In summary, the correct statement is option C: "In amplitude modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal." This statement accurately describes the process of amplitude modulation, where the carrier wave amplitude is modulated based on the audio signal amplitude.
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