Question

Intermediate frequency of FM receiver:
A) $10.7\,MHz$
B) $455\,kHz$
C) $455\,MHz$
D) $10.7\,kHz$

Answer 1

Hint: For every communication system there is a transmitter and receiver, the transmitter transmits the signal in the form of waves. So that the transmitted waves have some frequency. And also, the receiver receives the signal which has some frequency.

Complete solution:
A radio or FM receiver is an electronic device that receives the radio waves or signals and converts the information carried by the waves or the signals to the usable form. An antenna is used to receive the required frequency waves or signals to convert it to the information. In receiver, it will use the electronic filter to separate the required frequency waves or the signals from the other signals that are received by the antenna, an electronic amplifier is used to increase the power and strength of the signal for the next process, and finally gets the required information through the demodulation.
Frequency modulation is one of the most popular one in radio waves. The frequency modulation is commonly used in the broadcasting of the radio waves. It is also used in telecommunication, RADAR, and monitoring the new-borns babies via electroencephalogram, multi way radio systems, musical instruments, magnetic recording systems and some visual transmission systems.

Every receiver circuit which has some frequency range, if the frequency is the desired frequency it receives the signals, if the frequency is not the desired frequency it will not receive the signals. And the frequency range of the FM receiver around $10.7\,MHz$.

Hence, the option (A) is the correct answer.

Note: The RF amplifier receives the radio waves or signals and gives to the mixer and the mixer gives the signal or waves to the filter, here the required frequency of the wave or signal is separated and gives the required frequency of the waves to the demodulator, then it is converted to the audio information.