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Radio Receiver Theorem Question & Answers

April 5, 2022 By WatElectronics

This article lists 100 Radio Receiver MCQs for Engineering Students. All the Radio Receiver Questions & Answers given below includes solution and link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the radio receiver.

In the year 1986, the first radio receiver was invented by Alexander Stepanovich Popov based on electromagnetic waves. The amplitude modulation and frequency modulation of radio receivers work on the superheterodyne principle. The RF amplifier is optional in AM receivers whereas in FM receivers the RF amplifiers are mandatory. The selectivity, image frequency rejection, fidelity, and sensitivity are the performance parameters of the radio receiver.

The amplitude modulation receiver receives the broadcast of music or speech from AM transmitters that operates on short, medium, or long wavebands and the frequency modulation receiver receives a broadcast from frequency modulation transmitters that operates in ultra-high or very high-frequency bands.

The AM station will broadcast a signal at a constant frequency but will add a sound wave representing the actual radio to that base signal it's also called a carrier wave. The antenna creates an electrical current that corresponds to the radio signal, and that electrical current is sent to other parts of the radio, that filter out the irrelevant parts of the signal and is sent to speakers, headphones, etc.

The function of the radio receiver is to select the desired signals and reject the unwanted signal, amplify the RF signal, and demodulate the selected signal. The radio receiver and radio station transmitter are the two main components of a radio system. The intermediate frequency of amplitude modulation radio receiver is around 470KHz whereas in frequency modulation radio receivers the frequency is around 10.8MHz.

1). Which one of the following receivers receives the broadcast of music or speech from amplitude modulation transmitters that operates on short, medium, or long wave bands?
HintThe transmitter which receives the signal is AM so the receiver which receives the signal is AM receiver
2). The insufficient selectivity in tuned radio frequency receiver is due to _______________ ?
HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver
3). The poor adjacent channel rejection results when the intermediate frequency is __________________ ?
HintThe poor adjacent channel rejection and poor selectivity result when the intermediate frequency is too high
4). The image frequency rejection becomes poor when the intermediate frequency is __________________ ?
HintThe selectivity is poor if the intermediate frequency is too high, if IF is low then the result is poor image frequency rejection
5). Which one of the following intermediate frequencies makes the selectivity too sharp?
HintIf IF is too high results poor selectivity, if IF is very low results sharp selectivity
6). Which one of the following antennae is a wire type of antenna?
HintThe reflector antenna is an aperture type of antenna
7). The variation in bandwidth over tuning range in tuned radio frequency receiver is due to _______________ ?
HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver
8). Which one of the following is a type of highly directional antenna?
HintThe dipole, collinear are ominidirectional antennas and panel, yagi are semidirectional antennas
9). The horizontal beamwidth is 30 to 180 degrees in _______________ antenna?
HintThe Patch/panel is one type of semidirectional antenna with 30 to 180 degrees horizontal beamwidth
10). The figure shown below is a block diagram of ____________________ receiver?
Block Diagram of a Superheterodyne Receiver
HintThe Superheterodyne receiver is one type of radio receiver which works on the heterodyne principle
11). Which one of the following components converts the audio signals into sound waves?
HintThe loudspeaker, detector, and tuned circuits are components of radio receivers
12). Which one of the following components acts as an oscillator as well as a mixer?
HintThe FET, bipolar transistors, integrated circuits, dual-gate MOSFET's, etc are the common type of mixers
13). What is the standard form of AGC?
HintThe automatic gain control adjusts the gain of the receivers automatically in radio receivers
14). In which one of the following automatic gain control the shifting operating point is towards the cutoff?
HintIn forwarding automatic gain control the shifting operating point is towards the saturation
15). The frequency range of amplitude modulation radio receiver is between ________________ ?
HintThe input signal in AM radio receivers is AM wave, the AM and FM are two types of radio receivers

Radio Receiver MCQs for Exams

16). What is the standard form of VLC?
HintThe applications of visible light communication include robots in hospitals, vehicle to vehicle communication, etc
17). What are the functions of the radio receiver?
HintThe radio receivers function is to select, amplify, and demodulate the signal
18). The horizontal beamwidth is 360 degrees in _______________ antenna?
HintThe omnidirectional is one type of antenna with 360 degrees horizontal beamwidth
19). Which one of the following antennae is a linearly polarised type of antenna?
HintThe dipoles and biconical antennas are wire type antennas
20). The figure shown below is a block diagram of _________________ receiver?
Block Diagram of a Tuned Radio Frequency Receiver
HintThe tuned radio frequency receiver is one type of amplitude modulation radio receiver
21). Which one of the following components amplifies the audio signals?
HintThe loudspeaker, detector, and tuned circuits are components of radio receivers
22). Which one of the following components is used to adjust the local oscillator frequency?
HintThe automatic gain control adjusts the gain of the receivers automatically in radio receivers
23). Which one of the following receivers receives the broadcast from frequency modulation transmitters that operates in ultra-high or very high-frequency bands?
HintThe transmitter which receives the signal is FM so the receiver which receives the signal is the FM receiver
24). The tuning range of microwave and radar receivers is from 1GHz to ________________ GHz?
HintThe microwaves can pass through any object that’s why they used in radars
25). When the modulation index increases in frequency modulation signal the power remain _________________ ?
HintThe FM and AM are two types of radio transmissions in radio communication
26). Which one of the following components in the FM receiver is used to increase the radio signal power?
HintThe antenna detects the frequency waves and the electronic filters separate the required radio waves
27). Which one of the receivers is a double frequency conversion?
HintThe superheterodyne receiver is the type of receiver with single frequency conversion and there is no frequency conversion in the TRF frequency receiver
28). The instability in tuned radio frequency receiver is due to _______________ ?
HintThe instability, variation in BW over tuning range, and insufficient selectivity are the drawbacks of tuned radio frequency receiver
29). In which year the first radio receiver was invented?
HintThe first radio receiver is invented based on electromagnetic waves
30). The figure shown below is a block diagram of ____________________ receiver?
Block Diagram of Simple Radio Receiver
HintThe aerial, tuned circuit, detectors, AF amplifier, loudspeakers are the components of simple radio receivers

Radio Receiver MCQs for Quiz

31). Which one of the following components consists of capacitor and inductor coil?
HintThe loudspeaker, detector, and tuned circuits are components of radio receivers
32). In which one of the following automatic gain control the shifting operating point is towards the saturation?
HintIn reverse automatic gain control the shifting operating point is towards the cutoff
33). The automatic gain controls are categorized into ____________________ types?
HintThe peak AGC, keyed AGC, and delayed AGC is the types of automatic gain controls
34). The frequency range of frequency modulation radio receiver is between _____________ ?
HintThe input signal in AM radio receivers is AM wave, the AM and FM are two types of radio receivers
35). Which one of the following receivers is used for the reception of short wave telephone signals and telegraph?
HintThe communication receiver, AM, FM, superheterodyne receivers are types of radio receivers
36). The process of converting all incoming RF signals to a lower frequency is called ________________?
HintThe superheterodyne receiver converts all incoming RF signals to a lower frequency
Read more about Radio Frequency (RF)
37). Which one of the following parts of the TRF receiver is used to detect the signal?
HintThe RF section band limits the received RF signal and amplifies the received RF signal
38). Which one of the following parts of the TRF receiver is used to demodulate the amplitude modulation wave?
HintThe RF section detects the signal and the audio section amplifies the recovered signal
39). The figure shown below is a block diagram of ____________________ receiver?
Block Diagram of a Communication Receiver
HintThe communication receiver is one type of radio receiver which is used for communication purpose
40). Which one of the following receivers used to receive television broadcast in ultra-high or very high-frequency bands?
HintThe receiver which receives television signals is known as the television receiver

Radio Receiver MCQs for Interviews

41). The tuning range of the MW broadcast amplitude modulation receiver is from 540KHz to __________________ ?
HintThe MW broadcast is nothing but a medium wave broadcast AM receiver
42). In a radio receiver the ________________ oscillator is used as a local oscillator?
HintThe hartley oscillator is used as a local oscillator in a radio receiver to change the signal frequency
43). Which one of the following receivers is used to receive ranging signals and radio detection?
HintThe purpose of radar receivers is to detect, amplify, and process the echoes from radio transmissions
44). Which is the advantage of a tuned radio frequency receiver?
HintThe main disadvantage of a tuned radio frequency receiver is the audio quality is poor
45). Which one of the following receivers converts all incoming RF signals to a lower frequency?
HintThe process of converting all incoming RF signals to a lower frequency is called IF
46). How many batteries do crystal radio receivers require?
HintThe crystal radio receiver gets all of its power from the radio waves
47). The figure shown below is a block diagram of ____________________ receiver?
Block Diagram of a FM Receiver
HintThe frequency modulation receiver is one type of superheterodyne radio receiver
48). Which one of the receivers is a Single frequency conversion?
HintThe communication receiver is double frequency conversion and there is no frequency conversion in the TRF frequency receiver
49). Which one of the following components in the FM receiver is used to detect the frequency waves?
HintThe amplifier is used to increase the radio signal power and the electronic filters separate the required radio waves
50). The range of radio frequency transmitter and receiver is up to _________________ meters?
HintThe radio frequency receiver and transmitter used for wireless communications including mobile phones, radio transmission towers
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