General Awareness

Broadcasting and Television Media

1,065 Questions

Broadcasting and television media questions cover mass communication, signal transmission, and entertainment channels. These topics are frequently included in the general awareness sections of competitive exams. Answer these questions to stay updated on communication technologies.

AM broadcasting frequencyMass communication typesTelevision signal transmissionIndian television channelsDigital versus analog signals

Broadcasting and Television Media Questions

Multiple choice physics communication system commonly used terms in electronic communication system elements of communication system electromagnetic waves and communication system

Match the following: 

Name of device Usage
a. Antenna e. sends out information
b. Transmitter f. picks up information
c. Receiver g. converts energy in one form to another form
d. Transducer h. radiates signal
i. recieves signal

  1. a-e; b-g,h; c-f; d-h

  2. a-h,i; b-e; c-f; d-g

  3. a-f; b-e; c-f,i; d-h

  4. a-h; b-g,i; c-f; d-e
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to definitions use in communication systems: 
Antenna: A device that radiates signals. (Option h)
Transmitter: As the name suggests, it transmits (sends) out information. (Option e)
Receiver: As the name suggests recieves (pick ups) the information. (Option f)
Transducer: A device that converts variations in a physical quantity, such as pressure or brightness, into an electrical signal, or vice versa. That is option g.

Multiple choice physics communication system commonly used terms in electronic communication system elements of communication system electromagnetic waves and communication system

Which of the following is not a part of receiver?

  1. Receiving antenna

  2. Amplifier

  3. Modulator

  4. Demodulator
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A receiver receives the pre-modulated signal through receiving antenna, demodulates it using demodulator, and finally amplifies it to be sent as output to loudspeaker etc.

Multiple choice physics communication system commonly used terms in electronic communication system elements of communication system electromagnetic waves and communication system

In television transmission, the light from the object is converted into signals called:

  1. video frequency

  2. audio frequency

  3. very high frequency

  4. very low frequency
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Range of frequency for the signals which is used for transmitting videos is called video frequency or VF frequency bandwidth .It ranges between 0 and the highest frequency used to transmit a live telivision image

Multiple choice physics communication system commonly used terms in electronic communication system elements of communication system electromagnetic waves and communication system

The RF channel in a radio transmitter produces :

  1. Audio signals

  2. Both audio signal and high frequency carrier waves

  3. High frequency carrier waves

  4. Low frequency carrier waves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When audio signals are transmitted over thousands of kilometres through radio transmission, the audio frequencies that lie within the frequency range of 15 Hertz to 20 KiloHertz has very small signal power and thus cannot be transmitted via antenna for communication purposes. The radiation of electrical energy is only possible at frequencies above 20 KiloHertz.  Thus, the audio signals must be sent along with the high frequency signals for communication since the high frequency signals can travel long distance without dissipation in power. This can be done by superimposing electrical audio signals on a high frequency wave called the carrier wave by a process called modulation.

Multiple choice physics communication system commonly used terms in electronic communication system elements of communication system electromagnetic waves and communication system

What will be the image frequency of an FM radio receiver that is tuned to 91.6 MHz broadcast station?

  1. 111.8 MHz

  2. 113 MHz

  3. 121.6 MHz

  4. 132 MHz
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tuned frequency is $91.6MHz$ and corresponding oscillator frequency is $102.3MHz$. Then image frequency is $102.3+10.7 MHz = 113MHz$

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

The wave used by artificial satellites for communication is

  1. Microwaves

  2. Infrared rays

  3. Radio rays

  4. X-rays
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Microwaves are mostly used for satellite communication, as microwaves can pass straight through the atmosphere and connect antennas on earth to satellite in earth's orbit.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

Statement A: If the antenna is vertical,a vertically polarised EM wave is radiated
Statement B: The vertically polarised EM wave has electrical variations in the vertical plane

  1. A is true but B is false

  2. A is false but B is true

  3. A and B are false

  4. A and B are true
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Polarization of wave depends upon the orientation of the antenna. direction of polarization is along the orientation of antenna. By convention, direction of polarization of an EM wave is along the variation of electric field.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

The concepts of communication are
a) mode of communication
b) need for modulation
c) types of modulation
d) detection of modulated wave

  1. a, b, c are true

  2. b, c, d are true

  3. c, d, a are true

  4. a, b, c & d are true
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the concept of communication,

(a) Modes of communication are video, audio, face-to-face and text transmission.
(b) Modulation is needed, because original signal doesn't have the power to reach the desired destination, so it is modulated.
(c) Modulation are of different types, as amplitude modulation, frequency modulation and phase modulation etc. 
(d) Detection of modulated wave is done to extract the original signal from modulated wave.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

The science of communication involving long distances is known as

  1. mass-communication

  2. distant-communication

  3. tele-communication

  4. trans-communication
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Telecommunication is the transmission of signs, signals, messages, writings, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic systems. Telecommunication occurs when the exchange of information between communication participants includes the use of technology. 
 It is transmitted either electrically over physical media, such as cables, or via electromagnetic radiations.
20th and 21st century technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and  radio, fiber optics, and communication satellites.
Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

Which of the following is/are the example(s) of  real life telecommunication system?

  1. Optical fiber communication

  2. Microwave communication

  3. Coaxial cable communication

  4. None of the above
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Optical Fiber Communication, Microwave communication, and  coaxial cable communication are all being used in real life as communication systems. These are the advanced systems with high information transfer rate.

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

A receiver in a communication system must have

  1. Pick-up antenna

  2. Demodulator

  3. Amplifier

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A receiver in a communication system must have a pick-up antenna , a demodulator and an amplifier . A pick-up antenna is used to receive the signal . Then demodulator , separates the carrier wave from original signal . And amplifier , gives strength to the weak original signal .

Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

When two or more signals share a common channel, it is called:

  1. sub-channeling

  2. signal switching

  3. SINAD

  4. multiplexing
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When more than one signal shares a common channel for broadcasting, the method is known as multiplexing. The sent signal will be a single, complex signal and the receiver recovers the separate signals by a process called demultiplexing