Question

The RF channel in a radio transmitter produces?
A) Audio signals
B) Both audio and high frequency carrier waves
C) High frequency carrier waves
D) Low frequency carrier waves

Answer 1

Hint: A radio transmitter is an electronic device which is used to produce an electromagnetic wave which works as a signal when attached to an antenna. The Radio transmitter is most widely used in devices such as radio and television. A transmitter is a device which is used to transmit the signal over a long distance.

Complete answer:
Carrier wave is a wave which carries the information signal. Sometimes the voltage of the signal to be propagated is so weak that it travels a short distance and dies out, thus to overcome this problem it is modulated with a wave called carrier wave and it travels to the receiver and there the signal is demodulated to receive the desired information.
To do this process we need radio frequency transmitters and they work by producing high frequency carrier waves because the signals cannot overlap and also the power loss is reduced. So, the RF channel in a radio transmitter produces high frequency carrier waves

So, the correct answer is “Option C.

Note:
High frequency carrier waves are used for the transmission of audio signals over large distances because they travel in a straight line and their propagation is not hindered by the earth’s atmosphere. If we need to increase the energy of the wave, we just need to increase the frequency because frequency is directly proportional to the energy as per Planck’s quantum hypothesis.