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QUESTION :-
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Describe briefly three factors which justify the need for modulation of audio frequency signals over long distances in communication.
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1. Size of antenna or aerial: For communication the transmitting frequencies should be high.
2. ... The interference of signals from different transmitters: To avoid the interference of the signals there is a need of high frequency which can be achieved by the modulation
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Verified answer
[tex]\huge\tt\red{\underline{Answer}:}[/tex]
Three factors for the need of modulating a message signal: