If a low frequency signal in the audio frequency range is to be transm

1.	If a low frequency signal in the audio frequency range is to be transmitted over long distances,explain briefly the need of translating this signal to high frequencies before transmission.
Answer» The modulation is needed due to (i) Transmission of audio frequency electrical signals need long impracticable antenna. (ii) The power radiated at audio frequency is quite small, hence transmission is quite lossy. (iii) The various information signals transmitted at low frequency get mixed and hence can not be distinguished.

If a low frequency signal in the audio frequency range is to be transmitted over long distances,explain briefly the need of translating this signal to high frequencies before transmission.

Answer»

The modulation is needed due to

(i) Transmission of audio frequency electrical signals need long impracticable antenna.

(ii) The power radiated at audio frequency is quite small, hence transmission is quite lossy.

(iii) The various information signals transmitted at low frequency get mixed and hence can not be distinguished.