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Amplitude Modulation Video Lecture - Class 12
FAQs on Amplitude Modulation Video Lecture - Class 12
| 1. What is amplitude modulation (AM)? |  |
Ans. Amplitude modulation (AM) is a modulation technique used in communication systems to transmit information through variations in the amplitude of a carrier wave. It involves combining the message signal (audio or data) with the carrier signal, resulting in sidebands that carry the modulated information.
| 2. How does amplitude modulation work? | |
Ans. In amplitude modulation, the amplitude of the carrier wave is varied in proportion to the instantaneous amplitude of the message signal. This modulation can be achieved by multiplying the carrier wave with the message signal, resulting in the generation of sidebands that contain the modulated information. These sidebands are then transmitted along with the carrier wave.
| 3. What are the advantages of amplitude modulation? | |
Ans. Amplitude modulation offers several advantages in communication systems. It allows for the simultaneous transmission of multiple signals on different carrier frequencies, making it suitable for multiplexing applications. Additionally, AM signals can travel longer distances without significant loss and are less susceptible to noise interference compared to other modulation techniques like frequency modulation (FM).
| 4. What are the disadvantages of amplitude modulation? | |
Ans. Despite its advantages, amplitude modulation has certain limitations. One major disadvantage is its susceptibility to atmospheric and electrical interference, which can cause variations in the amplitude of the transmitted signal. This interference can result in poor signal quality and affect the overall performance of the communication system. Additionally, AM signals require a relatively larger bandwidth compared to other modulation techniques.
| 5. How is amplitude modulation used in practical applications? | |
Ans. Amplitude modulation finds wide applications in various practical scenarios. It is commonly used in broadcasting to transmit audio signals over radio frequencies. AM is also utilized in amplitude-shift keying (ASK) for digital modulation, where the presence or absence of the carrier signal represents binary data. Additionally, amplitude modulation is employed in radar systems, marine communication, and amateur radio transmissions.
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Nov 15, 2024 Last updated |
Amplitude Modulation for Class 122024 is part of Class 12 preparation. The notes and questions for Amplitude Modulation
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