Advertisement Remove all ads

State Three Important Factors Showing the Need for Translating a Low Frequency Signal into a High Frequency Wave before Transmission - Physics

State three important factors showing the need for translating a low frequency signal into a high frequency wave before transmission

Advertisement Remove all ads

Solution

Sound waves of frequency 20–20,000 Hz cannot be transmitted from a radio transmitter by converting them into electrical waves directly. Such low frequency signals need to be translated into high frequency waves before transmission. Three reasons for this are

i. For efficient transmission and reception, the transmitting and receiving antennas must have lengths equal to quarter wavelength of the audio signal. Setting up vertical antennas of such size is practically impossible.

ii. The energy radiated from an antenna is practically zero. The power radiated at audio frequency is quite small; hence, transmission occurs in loss.

iii. The various information signals transmitted at low frequency get mixed and hence cannot be distinguished

  Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×