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Modulation/Demodulation - Electrical Engineering Video Lecture - Electrical Engineering (EE)

FAQs on Modulation/Demodulation - Electrical Engineering Video Lecture - Electrical Engineering (EE)

1. What is modulation and demodulation in electrical engineering?
Ans. Modulation is the process of varying a carrier signal in order to transmit information, while demodulation is the process of extracting the transmitted information from the modulated carrier signal.
2. What are the different types of modulation techniques used in electrical engineering?
Ans. There are several modulation techniques used in electrical engineering, including amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), and quadrature amplitude modulation (QAM).
3. How does amplitude modulation work?
Ans. Amplitude modulation (AM) works by varying the amplitude of the carrier signal in proportion to the instantaneous value of the modulating signal. This variation in amplitude carries the information to be transmitted.
4. Why is modulation necessary in communication systems?
Ans. Modulation is necessary in communication systems because it allows for the efficient transmission of information over long distances. Modulating the carrier signal allows for the encoding and decoding of information, ensuring its accurate and reliable transmission.
5. What is the role of demodulation in a communication system?
Ans. Demodulation is crucial in a communication system as it is responsible for extracting the original information from the modulated carrier signal. By demodulating the signal, the transmitted information can be recovered and decoded for its intended purpose.
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