|Explain the following terms used in communication system.|
|(i) Attenuation The loss of strength of a signal while propagating through a medium is known as attenuation.|
|(ii) Demodulation The process of retrieval of information from the carrier wave at the receiver is termed as demodulation. This is the reverse process of modulation.|
|(iii) Amplification The process of increasing the amplitude and strength of a signal is called amplification. This is done by using an electronic circuit called amplifier. Amplification is done to compensate for the attenuations of signals in the communication medium.|
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