Transission at High Frequency

The element of Radio communication that convert radio waves back to sound is the ........

• Microphone

• Transmitter

• Receiver

• Loudspeaker

The term modulation in radio communication means

• Conversion of radio signal to sound

• Conversion of electrical signals into radio waves

• Conversion of sound into electrical signals

• All of the above

The work of the Microphone is to

• transmit radio waves to the air

• convert electrical energy to sound

• convert sound into electrical signals

• trap the electromagnetic waves from the air

Which element of radio transmission is used as a modulator

• Loud speaker

• Radio Transmitter

• Radio box

• Receiving aerial

The element of Radio communication used as a demodulator is the

• Transmitter

• Radio Box

• Transmitting aerial

• Loud Speaker

One of the following elements of radio communication is NOT found in our homes.

• Receiving aerial

• Radio receiver

• Loud Speaker

• Microphone

The different Radio stations transmit their messages using specific frequencies. What element of radio communication is used to select the frequency at which the station operates.

• The microphone

• The Loud Speaker

• The Transmitter

• The Radio receiver

A more modern method of receiving television signals now is through

• Intranet

• Satellite

• Oscillator

• None of the above

The work of the transmitting aerial is to

• Beam radio waves into air

• receive radio waves

• convert sound energy into electrical signals

• convert electrical signals into sound

The function of the receiving aerial is to

• convert electromagnetic waves into sound

• receive the radio waves

• convert sound into electromagnetic waves

• All of the above