Separation of a programme signal from the carrier wave is
(A) Modulation
(B) Demodulation
(C) Co-modulation
(D) Clear modulation
Correct Ans: (B)
Explanation:
Demodulation refers to the process of extracting the original program signal from a carrier wave. This step is crucial in communication systems because signals travel long distances as modulated waves. Without demodulation, receivers cannot interpret the transmitted information.
Radio, television, and telecommunication systems use demodulation to convert signals into audio or video formats. Devices such as radio receivers, televisions, and mobile phones rely on demodulators to process incoming signals. Without this process, transmitted content remains unusable.
The other options do not describe this function correctly. Modulation combines the program signal with a carrier wave for transmission, which is the opposite of demodulation. Co-modulation refers to interference between signals, not separation. Clear modulation is not a standard term in communication technology.
By using demodulation, broadcasting systems deliver high-quality sound and images. This process ensures that viewers and listeners receive accurate and distortion-free content.
