NCERT Solutions for Class 12 Sociology Part 2 Chapter 7 MCQ Mass Media and Communications question answers and solutions for session 2022-2023. Get free all the multiple choice questions of Social Change and Development in India chapter 7 in class 12 Sociology.

Class 12 Sociology Part 2 Chapter 7 MCQ Explanation


Modulation index of an AM signal

[A]. Depends upon the height amplitude of the modulating signal and also the carrier
[B]. Depends upon peak amplitude of modulating signal
[C]. Is a functions of carrier frequency
[D]. None of those


[A]. The amplitude of the carrier remains constant
[B]. The amplitude of the carrier varies in accordance with the amplitude of the modulating signal
[C]. The amplitude of carrier varies in accordance with the frequency of the modulating signal
[D]. None of those

In modulation process oftenness wave is termed as

[A]. Modulating wave
[B]. Modulated wave
[C]. Radio radiation
[D]. None

Digital signals

[A]. Represent values as discrete steps
[B]. Utilises binary codes system
[C]. Don’t provide endless set of values
[D]. All of those

In 1991 what percentage TV station were there
[A] 1
[B] 107
[C] 70
[D] 68
[C] 70
In 1991 there was one state. Controlled TV channel Doordarshan in India by 1998 there have been almost 70 channel.

Class 12 Sociology Part 2 Chapter 7 MCQ with Answers


Modulation index in an FM signal

[A]. Varies directly because the modulating frequency
[B]. Varies directly as frequency deviation and inversely because the modulating frequency
[C]. Varies inversely because the frequency deviation
[D]. None of those

The most commonly employed analog modulation techniques in satellite communication is that the

[A]. AM Frequency modulation
[B]. Modulation
[C]. Both [A] and [B]
[D]. All of the above

Satellites transponders are

[A]. Use a high frequency for reception and a lower frequency for re-transmission of knowledge to and form earth
[B]. Use a lower frequency for reception and a better frequency for re-transmission of knowledge to and from earth
[C]. Use a sign frequency for reception and re-transmission of data to and from earth
[D]. None of the above

For television transmission the frequency employed is often within the range

[A]. 30-300 Hz
[B]. 30-300 kHz
[C]. 30-300MHz
[D]. 30-300 GHz

When did color TV broadcasting started in India
[A] 1951
[B] 1975
[C] 1991
[D] 1982
[D] 1982
During Asia games On 25 April 1982 Doordarshan began testing color television programs in India. But in actuality, it was dedicated to India on 15th august 1982.

Class 12 Sociology Part 2 Chapter 7 Multiple Choice Questions

Which of the subsequent can happen to radiation traveling in free space

[A]. Reflection
[B]. Refraction
[C]. Absorption
[D]. Attenuation

High frequency wave are

[A]. Reflected by E.layer
[B]. Absorbed by F layer
[C]. Affected by the solar cycle
[D]. Capable of use for long distance transmission

Which of the subsequent is invariably found on all communication satellite as a playload

[A]. Transponders
[B]. Camera
[C]. Optical telescope
[D]. None of those

An antenna is

[A]. Capacitive
[B]. Reactive
[C]. Inductive above its resonance frequency
[D]. None of those

Amateur or HAM station within which of the subsequent city
[A] Kolkata
[B] Delhi
[C] Ahmedabad
[D] Lahore
[A] Kolkata
Radio broadcasting which commenced in India through amateur HAM broadcasting clubs in Kolkata and channel within the 1920s matured into a public broadcasting system within the 1940 during the world war 2 when it become a significant instrument of propagation for allied forced in south east Asia.

Class 12 Sociology Part 2 Chapter 7 Important MCQs

Microwave link repeaters are typically 50 km apart

[A]. Because of atmosphere attenuation
[B]. Because of the world curvature
[C]. To make sure that signal voltages might not harm to repeater
[D]. None of these

Optical communication uses the frequency range of

[A]. 10 9 to 10 10 Hz
[B]. 10 5 to 10 6 Hz
[C]. 10 14 to 10 15Hz
[D]. 10 16 to 10 17 Hz

Audio signal have frequency range

[A]. 20 Hz to twenty kHz
[B]. 20 kHz to twenty MHz
[C]. 20 MHz to twenty GHz
[D]. All of the above

The primary attempts at printing books using modern technologies began in

[A]. America
[B]. Africa
[C]. Asia
[D]. Europe

Which called media is watchdog of democracy
[A] Jawaharlal Nehru
[B] Spiritual leader
[C] Sardar Patel
[D] Subhash chandra bosh

[A] Jawaharlal Nehru
In independent India J L Nehru the primary prime minister called upon the media to function because the watchdog of democracy.