Amplitude Modulation
In AM, carrier amplitude varies proportional to:
Select the correct option:
Solution
Modulating signal
In Amplitude Modulation (AM), the instantaneous amplitude of the carrier wave is varied in accordance with the instantaneous amplitude of the modulating (message) signal. If the carrier is C(t)=Acsin(ωct) and message is m(t), the AM wave is: xAM(t)=[Ac+m(t)]sin(ωct). The 'envelope' of the resulting wave follows the shape of the modulating signal.
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About This Question
- Subject
- physics
- Chapter
- communication systems
- Topic
- amplitude modulation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Modulating signal
In Amplitude Modulation (AM), the instantaneous amplitude of the carrier wave is varied in accordance with the instantaneous amplitude of the modulating (message) signal. If the carrier is C(t)=Acsin(ωct) and message is m(t), the AM wave is: xAM(t)=[Ac+m(t)]sin(ωct). The 'envelope' of the resulting wave follows the shape of the modulating signal.
This easy difficulty physics question is from the chapter communication systems, covering the topic of amplitude modulation. It appeared in the 2025 exam.
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